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What are older rocks that lie under younger rocks called?
You may be referring to an "outlier" which is an area of older rocks surrounded by younger ones due to faulting and erosion removing layers of younger rocks and forcing older ones up into them. You may also potentially be referring to a xenolith. This is a fragment of older material that has not melted that is trapped within lava or other younger igneous material.
How can older rocks be found on top of younger rocks in a cross-section?
This can happen due to the process of tectonic activity, where older rocks are pushed up and over younger rocks during mountain-building events, known as thrust faults. As a result, the relative positions of rocks are altered, with older rocks ending up on top of younger rocks in the Earth's crust.
What older rocks lie under younger rocks?
the answer is the principle of superposition
Here rocks above this surface are forced up and over rocks below the surface?
This geological phenomenon is called overthrusting, where older rocks are pushed up and over younger rocks due to tectonic forces. It results in the older rocks being positioned above the younger ones.
In undisturbed rocks The older rock on the bottom and the younger of the rocks are on top?
yes.
Are the Rocks near axial are younger or older than the rocks in Oregon?
What is axial?
A break that separates older metamorphic rocks form younger sedimentary rocks immediately above them is a type of unconformity called an?
a nonconformity
What is supersition?
It says the younger rocks lie above older rocks if the rocks have not been disturbed .
Why is the devonian layer older than the triassic?
Because in areas where the rocks are layered, the Devonian is found lower.
What are sedimentary rock composed of older rocks called?
Sedimentary rocks composed of older rocks are called "conglomerate" or "breccia." These rocks form when fragments of older rocks are compacted and cemented together to create a new rock.
What is superpostioning?
The Law of Superposition states that younger layers of deposition will form on top of older layers of deposition.
How are the laws of superposition and crosscutting relationships used to determine the age of rocks?
They are used to determine the relative ages of rocks by stating that younger rocks lie above older rocks, and that rocks that cut through a layer are younger than the existing layer.
