Geography Middle School

Millions of years ago, the Sierra Nevada region began to be uplifted along a crack in Earth's crust. The region on the other side of the crack moved downwards. Which physical feature most likely resulted from such a motion?

Fault block mountain with rough edges and steep cliffs
Fault block mountain with waves, twists, and turns
Folded mountain with rough edges and steep cliffs
Folded mountain that appeared wavy

Answers

Answer 1

Fault block mountain with rough edges and steep cliffs resulted from the Sierra Nevada region being uplifted in Earth's crust and the region on the other side of the crack moving downwards. So. option (a) is relevant.

What are Fault blocks ?

The Earth's crust experiences tectonic and localized forces that result in very huge chunks of rock called fault blocks, some of which can span hundreds of kilometers. Faults separate large regions of bedrock into separate blocks. Blocks are distinguished by reasonably consistent lithology. The largest of these fault blocks are crustal blocks.. Terranes are big crustal pieces that break off from tectonic plates. Microplates are terranes that span the entire lithosphere's thickness. Continent-sized blocks are referred to by a variety of names, including extensional allochthons, H-blocks, continental ribbons, and outer highs.

The effects of moving blocks vertically, however, are much more striking. Sometimes, landforms (such as mountains, hills, ridges, lakes, valleys, etc.) are created when faults have a significant vertical displacement. High escarpments can be created by nearby down-dropped (grabens) and raised (horsts) blocks. Due to compaction or stretching of the crust at that location, the movement of these blocks is frequently accompanied by tilting.

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Answer 2

Answer:

A

Explanation:

Just trust me. =)

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