The most visible platy, parallel, mineral grains in foliated metamorphic rocks are usually micas, followed by calcite, feldspars, and quartz. Micas have a distinct platy structure, making them easily visible. Calcite, feldspars, and quartz are also common, although not as distinct in appearance.
The platy, parallel, mineral grains that are the most visual aspect of foliated metamorphic rocks are micas. Metamorphic rocks are rocks that have undergone a metamorphic process. Heat, pressure, and chemical alteration are all examples of such alterations.
These changes are influenced by geological forces such as plate tectonics, magma intrusion, or mountain-building (orogeny) pressures. They are classified as metamorphic rocks if they exhibit substantial structural or mineralogical adjustments relative to their original state.
Some of the common metamorphic rocks are marble, slate, gneiss, schist, etc. Foliated metamorphic rocks, such as schist and gneiss, have a texture that results from the alignment of mineral grains due to extreme pressure and temperature.
Foliated metamorphic rocks have a parallel arrangement of minerals that gives them a platy or layered appearance. They can be distinguished from unfoliated rocks like quartzite and marble, which lack the layered structure seen in foliated metamorphic rocks. Micas are the most visible aspect of foliated metamorphic rocks.
The minerals in foliated metamorphic rocks tend to be flattened, and they appear as elongated flakes or scales. Micas are the most frequent minerals in foliated metamorphic rocks. They have a tendency to separate into thin, flexible sheets, resulting in a distinctively flaky appearance that is particularly prominent in schist.
Therefore, the platy, parallel, mineral grains that are the most visual aspect of foliated metamorphic rocks are micas.
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Determine whether or not each discovery contributed to the confirmation that other galaxies existed outside of the Milky Way. Answer BankVesto Slipher discovered that "spiral nebulae" were receding at great speeds. Immanuel Kant suggested that some nebulae might actually be distant star systems. Edwin Hubble measured the distance of the Andromeda Galaxy. Edwin Hubble resolved individual stars in several spiral nebulae.Confirmed other galaxies exist =?Did not confirm other galaxies exist=?
When it comes to the contributions to the confirmation that other galaxies existed outside of the Milky Way, Vesto Slipher discovered that "spiral nebulae" were receding at great speeds.
Immanuel Kant suggested that some nebulae might actually be distant star systems, Edwin Hubble measured the distance of the Andromeda Galaxy and Edwin Hubble resolved individual stars in several spiral nebulae.
Vesto Slipher discovered that "spiral nebulae" were receding at great speeds. The discovery contributed to the confirmation that other galaxies existed outside of the Milky Way.Immanuel Kant suggested that some nebulae might actually be distant star systems. This discovery did not contribute to the confirmation that other galaxies existed outside of the Milky Way.
Edwin Hubble measured the distance of the Andromeda Galaxy. The discovery contributed to the confirmation that other galaxies existed outside of the Milky Way.Edwin Hubble resolved individual stars in several spiral nebulae. The discovery contributed to the confirmation that other galaxies existed outside of the Milky Way.
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During the winter, the amount of snowfall increases on a glacier, which causes accumulation and the glacier to thicken, and because there is not much melting this creates a net gain of ice called a __________ ice budget.
During the winter, the amount of snowfall increases on a glacier, which causes accumulation and the glacier to thicken, and because there is not much melting this creates a net gain of ice called a positive ice budget.
A glacier is a huge mass of ice that moves gradually over the land. Most glaciers are found in polar and sub-polar areas. Glacier ice is unique in that it moves. They are formed when the snow accumulates over the years and converts into ice. When snow accumulates in winter more than melts in summer, the ice sheet gains mass, resulting in a net gain of ice called a positive ice budget. Conversely, when the ice melts in summer more than snow accumulates in winter, the ice sheet loses mass, resulting in a net loss of ice called a negative ice budget.
During winter, the amount of snowfall on a glacier increases, causing accumulation and glacier thickness. In contrast, during the summer, the glacier starts melting, causing ablation and glacier thinning. A glacier's total annual gain or loss in mass due to these processes is referred to as the glacier's mass balance or ice budget.
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which statement about air motions is not correct? group of answer choices low-pressure centers are associated with strong convergence aloft. high-pressure centers are associated with divergence at the surface. air rises in the vicinity of low-pressure centers, leading to clouds and precipitation. air sinks in the vicinity of high-pressure centers, leading to relatively clear skies.
The incorrect statement about air motions is: "Low-pressure centers are associated with strong convergence aloft."
What are Air Motions?
Air motions are movements in the Earth's atmosphere caused by a variety of factors, including pressure differences, solar radiation, and temperature contrasts, among others. The air moves from regions of high pressure to regions of low pressure, according to the pressure gradient force (PGF).
As the air rises and cools, the moisture in the air condenses and forms clouds, which can lead to precipitation. The sinking of air results in high atmospheric pressure and creates clear skies. However, as the air reaches the ground, it begins to spread out again, creating the circulation patterns that are commonly associated with high and low-pressure systems.
In summary, high-pressure systems are associated with sinking air, clear skies, and dry weather, while low-pressure systems are associated with rising air, cloudy skies, and precipitation. Therefore, the incorrect statement is "Low-pressure centers are associated with strong convergence aloft."
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the earth's lowest barometric pressures are associated with hurricanes (typhoons). frontal systems (cold and warm fronts). sea level. cold and dry climates. very cold temperatures.
The Earth's lowest barometric pressures are associated with hurricanes (typhoons).
What are hurricanes (typhoons)?
Hurricanes or typhoons are severe tropical storms characterized by low atmospheric pressure, heavy rain, and strong winds. In the West, hurricanes are called typhoons in the East. Such storms develop in the Atlantic Ocean, Gulf of Mexico, and the Caribbean Sea in the United States.
Typhoons are formed in the Pacific Ocean, especially in Japan and the Philippines.
What is barometric pressure?
Barometric pressure is a measure of air pressure that varies from location to location. The pressure exerted by the weight of the atmosphere on the Earth's surface is known as barometric pressure.
The barometric pressure is measured in units of mercury millimeters (mmHg) or inches of mercury (inHg) in the United States, as well as in millibars (mb) or kilopascals (kPa) in other countries. The Earth's lowest barometric pressures are associated with hurricanes (typhoons).
Hurricanes (typhoons) are storms characterized by low atmospheric pressure, heavy rain, and strong winds. When such a storm passes through an area, it causes the barometric pressure to decrease, resulting in the lowest barometric pressures.
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what are the most likely changes to atmospheric temperature and precipitation along the west coast of south america during el nino
During El Nino events, the west coast of South America experiences warmer atmospheric temperatures and reduced precipitation.
El Nino events typically lead to an increase in sea surface temperatures in the central and eastern tropical Pacific Ocean. This warm oceanic anomaly affects the atmospheric circulation and leads to warmer temperatures along the west coast of South America.
El Nino is associated with a shift in rainfall patterns, resulting in decreased precipitation along the west coast of South America. The warm oceanic conditions disrupt the normal atmospheric circulation patterns, leading to a weakening or reversal of the trade winds.
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the rain forests of the world trap a large amount of carbon dioxide, a greenhouse gas. every year, however, more rain forest is cut down and burned, releasing huge amounts of carbon dioxide. which graph best shows the likely effect on climate?
Graph C is the most accurate because it represents the real picture of what is going on with respect to the world's rainforests and their impact on the environment.
The process of deforestation, which is largely the result of human activities, has an enormous effect on global warming and climate change. Rainforests play a significant role in the world's carbon cycle, and they are also important components of the water cycle.
Trees absorb carbon dioxide from the air, converting it into oxygen and carbon, which they store in their trunks, roots, leaves, and other parts of the tree. The stored carbon is released back into the atmosphere when trees are cut down, burned, or allowed to decompose.
In contrast, greenhouse gases, which include carbon dioxide, methane, and nitrous oxide, are emitted into the atmosphere when trees are burned or cut down.
They do not reflect the negative effects of cutting down rainforest and releasing the carbon dioxide and other greenhouse gases that were stored by the rainforest's trees.
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which kind of seismic wave is responsible for the most shaking (and thus, the most damage to human structures)?
The body waves and surface waves responsible for the most shaking.The seismic wave responsible for the most shaking (and thus, the most damage to human structures) is the surface wave.
What are seismic waves?Seismic waves are waves that are generated by earthquakes and other disturbances in the Earth's surface, such as explosions, volcanic activity, and landslides.
They are made up of various types of waves, each with its own distinctive characteristics. There are two types of seismic waves: body waves and surface waves.
Body waves are seismic waves that travel through the Earth's interior. P-waves and S-waves are two types of body waves. Surface waves, on the other hand, are seismic waves that travel along the Earth's surface.
Rayleigh waves and Love waves are two types of surface waves.
Surface waves are responsible for the most shaking (and thus, the most damage to human structures).
The reason for this is that they travel more slowly than body waves, which allows them to cause more sustained shaking.
They are also more complex than body waves, which can cause them to interact with the Earth's surface in unpredictable ways that can lead to more intense shaking.
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the pelagic zone is best defined by which option? responses all the open water of the ocean all the open water of the ocean the benthic zone only the benthic zone only the deep ocean the deep ocean the intertidal zone only
The pelagic zone is best defined by "all the open water of the ocean." Therefore the correct option is option A.
The pelagic zone is the area in the ocean that is not connected to the seafloor, and is thus sometimes referred to as the "open ocean." The pelagic zone is defined by all the open water of the ocean, which is often separated into vertical zones by depth, depending on light levels, temperature, and other physical variables.
The epipelagic zone, the mesopelagic zone, the bathypelagic zone, and the abyssopelagic zone are the four layers of the pelagic zone that exist. There is less life in the open pelagic zone than in shallower waters, and it is difficult for marine animals to survive there because they have to fight the constant movement of the ocean.
Despite the harshness of the open ocean, a diverse array of sea creatures exist there, ranging from small planktonic organisms to large marine mammals. Therefore the correct option is option A.
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The following question may be like this:
The pelagic zone is best defined by which option? responses
all the open water of the ocean the benthic zone only the deep ocean the intertidal zone onlyWhat are the three ways In which corruption will negatively affect the financial growth of South Africa
Answer:
unemployment, reduction in tax revenue, decline in business operation and ultimately, collapse of the economy
short term changes in atmospheric variables such as temperature, wind, precipitation, and barometric pressure over a given area and period of days are an example of:
The short term changes in atmospheric variables such as temperature, wind, precipitation, and barometric pressure over a given area and period of days is an example of weather patterns.
Weather patterns are the result of large scale movement of air masses and their interaction with other meteorological factors. They determine the type of weather, like sunny days or rainy days, that a given area experiences over a period of days.
Weather patterns are formed when areas of high and low pressure interact. Air moves from areas of high pressure to areas of low pressure, creating an airflow pattern. The temperature, wind, precipitation, and barometric pressure all are affected by this airflow pattern.
Changes in these atmospheric variables depend on the strength of the pressure system and its movement. When the pressure system is strong and stationary, there is little change in the weather pattern. However, when the pressure system is weak and moving, the atmospheric variables will be more volatile.
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the dominant surface winds from the subtropics to high latitudes are the question 63 options: trade winds. westerlies. geostrophic winds. polar easterlies.
The dominant surface winds from the subtropics to high latitudes are the westerlies.
What are westerlies?The winds that blow from west to east in the middle latitudes are known as westerlies. These are observed mainly between 30 and 60 degrees north and south of the equator. As the earth spins on its axis, the Coriolis effect causes the westerlies to appear as westerly winds.
How do westerlies occur?At around 30 degrees north and south of the equator, rising hot air creates an area of low pressure. Air flows away from these low-pressure areas toward areas of high pressure at around 60 degrees north and south of the equator.
Why are westerlies considered significant?The westerlies have a significant impact on the Earth's climate, and they are an essential element of the global circulation system. They play a crucial role in the movement of weather systems across the globe, including storms, hurricanes, and mid-latitude cyclones.
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What is the history relations of the United States and Cuba?
Answer:
Cuba and the United States restored diplomatic relations on July 20, 2015. Relations had been severed in 1961 during the Cold War. U.S. diplomatic representation in Cuba is handled by the United States Embassy in Havana, and there is a similar Cuban Embassy in Washington, D.C.
which of the following are geologic settings where travertine can form? choose one or more: a. in glacial lakes b. in caves c. in fast-moving rivers d. near hot springs e. in swamps
Travertine can form in a variety of geologic settings, including in caves, near hot springs, and in fast-moving rivers. Therefore the correct option is option A, B and C.
In caves, travertine forms as a result of carbon dioxide in the air dissolving in water. This results in an increase in the acidity of the water, which in turn dissolves the rock the cave is made of and deposits the resulting sediment in the form of travertine.
Near hot springs, the water is saturated with dissolved minerals such as calcium carbonate, which can also be deposited in the form of travertine.
In fast-moving rivers, the increased turbulence can cause the suspended sediment in the water to become trapped and deposited in the form of travertine.
Travertine can also form in glacial lakes, but not in swamps.
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__________ __________ are steep, high walls built along the coast to prevent beaches from eroding. They are usually made out of concrete.
"Sea walls are steep, high walls built along the coast to prevent beaches from eroding. They are usually made out of concrete."
Sea walls are human-made structures built along the shoreline to protect coastal areas from the effects of erosion and flooding. These walls are typically constructed using durable materials such as concrete, and they are designed to absorb the impact of waves and tidal forces.
By providing a physical barrier between the ocean and the land, sea walls can prevent erosion, protect property and infrastructure, and maintain the integrity of coastal ecosystems. However, some experts have raised concerns that sea walls can also have unintended consequences, such as disrupting natural coastal processes, altering the local hydrology, and exacerbating erosion in adjacent areas.
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the driving force of plate tectonics is group of answer choices sea-floor spreading. geomagnetism. atmospheric circulation. all of the above
The driving forces of plate tectonics include sea-floor spreading, geomagnetism, and atmospheric circulation. All of the above are driving forces of plate tectonics.
Sea-floor spreading is the movement of tectonic plates away from mid-ocean ridges, which is caused by magma pushing up from the Earth's mantle and solidifying. Geomagnetism is the magnetic field created by molten iron in the Earth's core, which contributes to the directional movement of plates. Atmospheric circulation, the flow of air in the atmosphere, affects the formation of large-scale wind and ocean currents that can move the plates.
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what is the definition of magma mixing? when magma incorporates more dissolved gases when one rising magma will overtake a second and the two intermix when rising magma melts surrounding country rock and incorporates it when magma mixes with fluids to become more dilute
Definition: The process by which two or more distinct magmas combine to form a mixture of their individual compositions is known as magma mixing.
Explanation: When two or more magmas with various compositions come into contact with one another, they mix and become one. This process can take place in a number of different ways, such as when two magmas combine and overwhelm one another or when a magma melts and integrates nearby rock or fluids. The resulting mixed magma may differ from either of the parent magmas in terms of composition, temperature, and gas content. Magma mixing is a crucial step in the development of many different kinds of igneous rocks and can shed light on a region's geological past.
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using the richter scale, an earthquake of magnitude 7.5 releases about how much more energy than one of magnitude 5.5?
The final answer are earthquake of magnitude 7.5 releases about 3,126,339 joules more energy than one of magnitude 5.5.
The Richter Scale measures the energy of an earthquake, and the magnitude of an earthquake is a measure of the amount of energy released by the earthquake.
The formula for the energy released by an earthquake is E = 10^(3/2M + 9.1), where M is the magnitude of the earthquake.
Using the Richter Scale, an earthquake of magnitude 7.5 releases about how much more energy than one of magnitude 5.5?
We can find the difference in energy by using the formula and plugging in the values:
E(7.5) = 10^(3/2*7.5 + 9.1) = 3,162,277 joules
E(5.5) = 10^(3/2*5.5 + 9.1) = 35,938 joules
The difference in energy released by the two earthquakes can be found by subtracting the two values:
E(7.5) - E(5.5) = 3,162,277 - 35,938 = 3,126,339 joules
Therefore, an earthquake of magnitude 7.5 releases about 3,126,339 joules more energy than one of magnitude 5.5.
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if quartz is present in an igneous rock, what composition must it be?group of answer choicesultramaficmaficintermediatefelsic
If quartz is present in an igneous rock, it must be of felsic composition.
Igneous rocks are formed from solidification and cooling of lava or magma. Magma is a molten material beneath the Earth's surface. If it cools and solidifies inside the Earth, it forms plutonic rocks. If it cools and solidifies on the surface, it forms volcanic rocks.Igneous rocks are further divided into four main groups depending on their chemical composition. The four groups are as follows: Ultramafic, Mafic Intermediate and Felsic.
Each group is determined by the proportion of minerals present in the rock. The amount of silica present in the rock is used to determine the groups. Felsic rocks contain the most silica while ultramafic rocks contain the least silica. Mafic rocks have an intermediate silica content while intermediate rocks have a silica content that is between that of felsic and mafic rocks.Quartz is a mineral that is rich in silica. Therefore, if quartz is present in an igneous rock, it must be of felsic composition.
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which type of cloud shows the greatest vertical growthwhich cloud type would be most likely to form in an unstable atmosphere?
The type of cloud that shows the greatest vertical growth and is most likely to form in an unstable atmosphere is a cumulonimbus cloud.
The cumulonimbus cloud is known for producing strong winds, thunder, lightning, and heavy rain or snow.
These clouds are tall and dense and can grow to heights of over 10,000 meters (32,808 feet). They are composed of water droplets and sometimes contain ice crystals, which form due to the rapid condensation and uplifting of air.
An unstable atmosphere is characterized by warm, moist air near the surface and cooler air at higher altitudes, creating conditions that promote upward air currents and vertical development of clouds.
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drought can be caused by all the following except question 5 options: change in the direction of an ocean current persistent offshore breeze persistent low pressure persistent high pressure
Answer: drought is likely caused by persistent HIGH pressure, persistent offshore breeze, and changes in the direction of an ocean current.
Explanation:
matching question match each of these major north american earthquakes with its cause/description. alaska, 1964 alaska, 1964 drop zone empty. san francisco, 1906 san francisco, 1906 drop zone empty. new madrid, 1811-1812 new madrid, 1811-1812 drop zone empty. mexico city, 1985
The matching of each of these major north american earthquakes with its cause/description are:
Alaska, 1964: 9.2 magnitude earthquake caused by a strike-slip fault of the Pacific and North American tectonic plates.
San Francisco, 1906: 7.8 magnitude earthquake caused by the San Andreas Fault.
New Madrid, 1811-1812: Series of earthquakes estimated to have had magnitudes of up to 7.5-7.7, caused by movement of the tectonic plates.
Mexico City, 1985: 8.1 magnitude earthquake caused by a subduction zone of the Cocos and North American plates.
Alaska, 1964: The earthquake of 1964 occurred in Alaska with a magnitude of 9.2. The movement of the Pacific plate and North American plate led to this earthquake. The movement of plates created the earth's crust to break, leading to the earthquake. A tsunami was also generated due to the earthquake, which led to severe destruction.
San Francisco, 1906: In San Francisco, the 1906 earthquake occurred due to the movement of the San Andreas fault line. The earthquake's magnitude was 7.8, and it resulted in the loss of over 3000 lives.
New Madrid, 1811-1812: This earthquake occurred along the New Madrid fault line, and it had a magnitude of 7.5-7.7. It occurred due to the movement of the tectonic plates.
Mexico City, 1985: In Mexico City, the earthquake occurred due to the movement of the Cocos plate and North American plate. The earthquake had a magnitude of 8.1, and it caused massive destruction, loss of life, and property damages.
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The probable question may be:
matching question:
match each of these major north american earthquakes with its cause/description.
alaska, 1964 alaska, 1964 drop zone empty. san francisco, 1906 san francisco, 1906 drop zone empty. new madrid, 1811-1812 new madrid, 1811-1812 drop zone empty. mexico city, 1985
causes: 7.8 magnitude earthquake caused by the San Andreas Fault, 8.1 magnitude earthquake caused by a subduction zone of the Cocos and North American plates, Series of earthquakes estimated to have had magnitudes of up to 7.5-7.7, caused by movement of the tectonic plates, 9.2 magnitude earthquake caused by a strike-slip fault of the Pacific and North American tectonic plates.
Imagine that local government is closing your favorite park because of budget cuts. Outline a plan of how you would use the media to try to stop this action. << Read Less
To try to stop the local government from closing my favorite park, I would develop a plan to use the media effectively.
Here's how I would go about it:
Identify key media outlets: Identify the key media outlets in the local area, such as local newspapers, radio stations, and television stations.
Develop a message: Develop a clear and concise message that explains why the park is important and why it should not be closed. The message should be easy to understand and should appeal to a broad audience.
Reach out to the media: Reach out to the media outlets identified in step one and pitch the story. Be sure to provide a copy of the message, as well as any supporting materials.
Organize a protest: Organize a protest to bring attention to the issue. Use social media platforms to advertise the protest, and encourage supporters to attend.
Stay on message: During interviews with the media, stay on message and focus on the key points. Be prepared to answer questions and provide additional information as needed.
Follow up: Follow up with the media outlets and continue to provide updates and additional information as the situation develops. Keep the public informed and engaged in the issue.
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which is true concerning the blue and magenta colors used to depict airspace on sectional aeronautical charts? group of answer choices faded lines represent airspace which extends to the surface.
The given statement "the blue and magenta colors used to depict airspace on sectional aeronautical charts have faded lines which represent airspace which extends to the surface" is true because a sectional chart is a map utilized in air navigation that portrays the details of an area's airspace.
This map has contour lines and visual terrain characteristics, including obstructions, lakes, and rivers, which provide pilots with the information they need to navigate safely in VFR conditions.
The sectional chart's primary objective is to depict land features that might help a pilot navigate the area. The chart contains many different symbols and markings to indicate obstacles, airports, and other important details that a pilot should be aware of while flying. The colors blue and magenta are used to denote airspace on sectional charts.
Meanwhile, magenta color denotes airspace that stretches from the surface up to 10,000 feet, above sea level. It indicates Class E airspace in which Class G airspace above 14,500 feet MSL is also depicted in magenta. The faded lines within the blue and magenta airspace denote airspace that extends to the surface, as mentioned earlier.
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__________ extend into the water to reduce the energy from waves thereby reducing their power. They cause a break in the longshore current.
Breakwaters extend into the water to reduce the energy from waves thereby reducing their power. They cause a break in the longshore current.
A breakwater may be a natural or man-made structure that is intended to act as a barrier against the action of waves. Breakwaters have various forms and designs, but they are typically made of rock, concrete, or other durable materials that can withstand the forces of waves. Breakwaters can help to control the direction of longshore currents by creating a barrier that redirects the flow of water. They cause a break in the longshore current, which can help to reduce erosion along the shoreline. They can also be used to protect harbors and other marine structures from the damaging effects of waves and currents.
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which of the following does not exert a major infuence on low -latitude climates? trade winds ictz thermal low pressure system subtropical high pressure cells westerlies
Answer: The correct option is WESTERLIES.
which type of unconformity is usually easiest to spot, since layers of sedimentary rocks are on top of igneous rocks without layers?
The type of unconformity, which is usually easiest to spot, since layers of sedimentary rocks are on top of igneous rocks without layers is called Disconformity.
What is an unconformity?
An unconformity is a contact between two groups of rock formations. An unconformity is a surface of erosion or non-deposition that separates younger from older rocks. A time gap or hiatus exists at the unconformity between the rock layers, indicating that some time has passed between the formation of the first group of rocks and the second group.
There are three types of unconformities: nonconformity, disconformity, and angular unconformity. An unconformity can be caused by tectonic events, sea-level shifts, or erosion, among other things.
A disconformity is an unconformity in which parallel layers of sedimentary rocks are separated by a break in sediment deposition or a layer of erosional material.
In a disconformity, the bedding planes of the strata above and below the unconformity are parallel, indicating a time gap in the sedimentary record.
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pure loam is considered to be the best kind of soil for a farm or garden and is often defined as a soil with roughly equal proportions of sand, silt, and clay. is that what the diagram shows?
Yes, pure loam is considered to be the best kind of soil for a farm or garden and is often defined as a soil with roughly equal proportions of sand, silt, and clay.
Loam soil is soil that is made up of an even mix of sand, silt, and clay. Loam is a form of soil that is often regarded as the perfect garden soil. It has a granular structure, which makes it easy to work with, and it is very fertile because it contains equal amounts of sand, silt, and clay.
Loam soil contains a lot of organic matter and is well-aerated, so it is ideal for cultivating a variety of crops. The diagram given below shows that pure loam is considered to be the best kind of soil for a farm or garden and is often defined as a soil with roughly equal proportions of sand, silt, and clay.
As a result, it can be concluded that the diagram shows that pure loam is regarded as the ideal soil type for a farm or garden.
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where is light penetration in a river or stream likely to be lowest? a. the source b. the mouth c. the middle portion d. none of the above please select the best answer from the choices provided a b c d
Light penetration in a river or stream is likely to be lowest at the middle portion. The correct option is C.
This is because the middle portion of a river or stream is typically the deepest and has the most sediment, which can block out or reduce the amount of light that penetrates the water.
Additionally, the middle portion is often where the greatest amount of currents and turbulence occur, which can further reduce the amount of light that reaches the bottom of the river or stream.
As light penetration decreases, photosynthesis rates are lowered and the amount of oxygen available to the aquatic life in the river or stream is also reduced. The correct option is C.
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a sandstone bed strikes 140 across a stream. the tresam flows down a narrow gorge with vertical walls. the apparent dip of the bed on the walls of the gorge is 25, 095. what is the true dip of the bed?
Answer : The true dip of that sandstone bed is 25°95'.
The apparent dip of the bed on the walls of the gorge is the angle that the bed strikes across the stream and down the narrow gorge. we calculate the angle of the bed relative to the horizontal plane. The true dip is the angle of inclination of the bed below the horizontal plane.
True dip = 90° - (90° - 25°95') = 25°95'. the true dip of the sandstone bed is 25°95', which is the angle of inclination of the bed below the horizontal plane.
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which of the following are types of pyroclastic debris? choose one or more: a. lapilli b. lava c. blocks d. ash e. magma f. gas g. lahar
The types of pyroclastic debris include the following: a) lapilli, d) ash, c) blocks, and g) lahars.
What are Types of Pyroclastic Debris?Lapilli are small fragments of volcanic debris with a size range between 2 mm to 64 mm. Ash is fine volcanic debris with a size less than 2 mm. Blocks are large, solid pieces of volcanic material that can be greater than 64 mm.
Lahars are mudflows composed of volcanic material mixed with water. Lava, magma, and gas are not considered pyroclastic debris since they are not ejected explosively during volcanic eruptions but rather flow out of the volcano in a more controlled manner.
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