Answer:
Wor Alluvium means to wash against, is a loose unconsolidated soil reshaped by water in soemfrom and redeposited in an non marine setting.
Explanation:
- Being typically made up of a variety of minerals like silt and clay. And larger particles of sand and gravel. When this loose material s being deposited and being cemented and lithified, its ten called as alluvial deposits.
- An alluvial fan is also the deposit left by the river like in lake sediments glacier sdimantand and river sediments. Belonging from the quaternary ages these are often referred to as "covers" as the sediments obscure the underlying sedimentary rocks.
- Alluvium contains ores of gold and platinum and a wide variety of gemstones. Such as the concentration of valuable ores and placer deposits. The marine sandstone, shale, and semi consolidated material occupy the major parts of the uplands.
Answer:
c. has been determined by radiometric dating
Explanation:
- Radiometric dating is a method that is used to determined by the age of rocks as per the age of the oceanic crust the plates near the mid oceanic ridges are the most recent or new.
- The plates that are located farther away form there ridges are oldest and hence the age of the oceanic crust is not the same in all the places of the world oceans.
Answer:
The Continental Divide is important because it separates two major watersheds.
Explanation:
The Continental Divide is a chain of mountain ranges that runs through North America, from Alaska to Panama. This chain of mountain ranges is dividing the continent into two major watersheds. It runs through eastern Alaska, western Canada, western United States, and through the central parts of Mexico and Central America.
The waters from the eastern side of this watershed divide mostly end up in the Atlantic Ocean and its seas, and partially in the Arctic Ocean and its sea. The waters from the western side of this watershed divide end up in the Pacific Ocean and its seas. The eastern watershed has significantly more water running through it than the western one, with the main reason being that the eastern one is significantly larger.
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Answer:
Explanation:
Sediments are typically laid down in layers, or strata, usually in a body of water. On the seafloor, sediments are thinnest near spreading centers (young seafloor) and thicker away from the ridge, where the seafloor is older and has more time to accumulate. Sediments are also much thickest near continents.
