Question

The Laramide Rockies formed between about 85-50 million years ago. A popular theory is this event was caused by "flat slab subduction" of over-thickened oceanic crust. From your understanding of mountain building processes in this part of the course, evaluate the following question(s). a. Was this mountain building process an Andean type mountain building event, a collisional event, or both; and what might have been subducted to produce the over-thickened oceanic crust that drove the orogeny? b. If these mountains formed 50 million years ago, why are they still high?

Answer 1

Answer:

A.its both actually Andean type mountain buildint event and a collisional event.

over the transcuration of the years ocean ridges and subductions have formed and maintains its constant thickness due to the melting/cooling/and insulation

Explanation:

B. many sciencetists assumed that land is been push upward to form mountains but in reality is earth channels getting steeper and steeper and erosion rate keeps increasing being able for mountains to maintain its high for million of years