Question

what is the correct sequence of mountain building events that occurred in the western united states over the last 100 million years (from oldest to most recent)

Answer 1

The correct sequence of mountain building events that occurred in the continents western united states over the last 100 million years is Fold & Thrust Belt; Uplift of Rocky Mountains; Continental Rift.

What is Continental Rift?

• Continental rifts are traditionally described as the thinning  of the lithosphere, the eventual breakup of continents, and the formation of mid-ocean ridges.
• Rifting is the first fundamental process by which  two continents separate into her two tectonic plates.
• Continental rift zones occur at weak points in  continental lithospheric plates.
• Mid-ocean ridges typically form in  continental plates as  rift zones that extend to the point where the plate divides, with water filling  the gap.
• As the crust thins, the hot, buoyant upper mantle rises.
• Eventually, the asthenosphere rises close to the surface and magma  erupts to the surface.
• Continental rift processes are demonstrated in the steep fault slopes and active volcanoes that characterize the western United States.

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Answer 2

Fold & Thrust Belt; Uplift of Rocky Mountains; Continental Rifting is the correct sequence of mountain building events.

What is a mountain building event called?

When two landmasses collide, orogeny, or mountain building, occurs. The continental crust may collide with another continent (a collision between continents), or the continental crust may crash with the oceanic crust (ocean-continent collision). Mountains are created by tectonic processes that cause the Earth's crust to rise in some places. These processes, which are powered by the heat that escapes from the Earth's interior and results in crustal uplift due to volcanic activity and movement along faults, are what ultimately lead to the construction of mountains.

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