Why does the elevation of the seafloor decrease from the mid ocean ridge to the abyssal plain quizlet?
Why does the elevation of the seafloor decrease from the mid-ocean ridge to the abyssal plain? The oceanic lithosphere cools and becomes denser.
Where was India located during most of the Mesozoic quizlet?
Where was India located during most of the Mesozoic? Afar Region in East Africa, and Yellowstone National Park in North America.
How can folding form a topographic high?
How can folding form a topographic high? Folding can cause warping and uplift. A folded, hard layer can be uplifted and more resistant to erosion than surrounding rocks.
Which of the following is not a setting in which regional mountain belts form?
Earth in Action #2
| Term | Definition |
|---|---|
| What could cause a region to be higher in elevation than an average part of a continent? | less dense continental crust |
| Which of the following is NOT a setting in which regional mountain belts form? | passive margin |
What setting has the thinnest cover of sediment in the ocean?
The thinnest layers of marine sediments are generally found in deep-ocean basins near mid-ocean ridges.
Where on the ocean floor is sediment the youngest and the seafloor the thinnest?
spreading centers 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.
In what setting does the thickest sediment accumulate in the oceans quizlet?
In what setting does the thickest sediment accumulate in the oceans? oceanic fracture zones.
When did the Western Interior Seaway exist in North America quizlet?
251 to 65.5 million years ago.
What takes place when rock layers are bent forming mountains and valleys?
Flexural folds form when layers slip as stratified rocks are bent. This results in the layers maintaining their thickness as they bend and slide over one another. These are generally formed due to compressional stresses acting from either side.
Where are fold mountains located?
Fold mountains are the most common type of mountain in the world. The rugged, soaring heights of the Himalayas, Andes, and Alps are all active fold mountains. The Himalayas stretch through the borders of China, Bhutan, Nepal, India, and Pakistan.
Why do some regions have high elevations?
If the lithosphere in some region is heated, it expands, becoming less dense, and so the region rises in elevation. Thinner lithosphere also yields higher elevations because in this case less dense asthenosphere is replacing more dense litho- sphere.
What geological conditions does mountain building take place?
Orogeny, or mountain building, is the result of collision between two landmasses. This may occur via collision of continental crust (continent-continent collision) or when oceanic and continental crust collide (ocean-continent collision).
Where do areas of thickest sediment occur?
Answer: The thickest marine sediment is located at the Continental rise. Away from the ridge, where the sea floor is older and has more time to accumulate; also much thickest near continents.
Where would you expect to find the thickest accumulation of seafloor sediment?
Sediment is thickest in the ocean basins in the areas around the edges of continents. This is because continents provide lots of sediment in the form of runoff of small pieces of rock and other debris from land.
Where do we find the thickest accumulation of sediments?
Sediment is thickest in the ocean basins in the areas around the edges of continents. This is because continents provide lots of sediment in the form of runoff of small pieces of rock and other debris from land.
Where the thickest and thinnest sediments accumulate in the oceans and why?
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.
Where are the thickest sediment found?
Sediment is thickest in the ocean basins in the areas around the edges of continents. This is because continents provide lots of sediment in the form of runoff of small pieces of rock and other debris from land.
Which part of the ocean basin contains the thickest sediment layer?
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.
What was the name of the sea that transgressed over the western part of North America during the early Mesozoic?
In the Middle Jurassic, the west-central part of the North American continent was flooded by what? a broad seaway that extended into Utah, called the Sundance Sea. The bones of marine reptiles are found in the sandstones and siltstones of the Sundance Formation, deposited in the Sundance Sea.
Which principle states that in an undisturbed sedimentary sequence the oldest layer lies at the bottom and the youngest layer at the top?
law of superposition, a major principle of stratigraphy stating that within a sequence of layers of sedimentary rock, the oldest layer is at the base and that the layers are progressively younger with ascending order in the sequence.
What is a recumbent fold in geography?
A recumbent fold has an essentially horizontal axial plane. When the two limbs of a fold are essentially parallel to each other and thus approximately parallel to the axial plane, the fold is called isoclinal.
What is a bend in layers of rock called?
Folding. A fold is a bend in the rock strata. Folding: Is a type of earth movement resulting from the horizontal compression of rock layers by internal forces of the earth along plate boundaries. A upfold are termed as anticlines. The downfolds are termed synclines.
Is Sierra Nevada a desert?
Extending more than 250 miles (400 kilometres) northward from the Mojave Desert to the Cascade Range of northern California and Oregon, the Sierra Nevada varies from about 80 miles wide at Lake Tahoe to about 50 miles wide in the south.
Is Himalaya in Pakistan?
Overview. The Himalaya is the highest mountain range in the world, extending along the northern frontiers of Pakistan, India, Nepal, Bhutan, and Burma and the southern border of Tibet.
Which place has the highest elevation above sea level?
Mount Everest's peak is the highest altitude above mean sea level at 29,029 feet (8,848 meters). Mount Chimborazo's peak is the furthest point on Earth from Earth's center. The summit is over 6,800 feet (2,072 meters) farther from Earth's center than Mount Everest's summit.
What type of crust is thicker?
continental crust Earth's crust is generally divided into older, thicker continental crust and younger, denser oceanic crust.
What happens at a subduction zone?
Subduction zones are plate tectonic boundaries where two plates converge, and one plate is thrust beneath the other. This process results in geohazards, such as earthquakes and volcanoes.
Where does mountain building occur?
Mountains are “built up” through pressures on the Earth's crust when plates collide. Where do mountain ranges occur in relationship to tectonic plates? Most form at the plate boundary edges because of collisions.
Where is deep-sea sediment the thickest?
continental margins Ocean sediment is thickest over continental margins and thinnest over active oceanic ridges. Sediment deposited on a quiet seafloor can provide a sequential record of recent events in the water column above. Sediments are recycled into earth at subduction zones.
Where is ocean sediment deepest?
Sediments can also form by the accumulation of shells of dead organism and can consist of mineral and/or fossil. Deepest areas of ocean floor which is far from land are dominated by abyssal clay which is called “red clay” and consists of smaller sediments which are carried away by the currents and winds.