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Why is igneous rock always younger than the rock layer it cuts through?
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What geologic law is applied if an igneous intrusion is observed through a layer of sedimentary rock?
law of crosscutting relationships.
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.
How are the laws of superposition and crosscutting relationship used to determine the relative 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.
What is a hardened layer in a volcano?
As lava cools, it hardens and forms a thick layer of rock. These rocks are known as igneous rocks. An example of an igneous rock is pumice, which is used in spa treatments to soften feet.
Why sedimentary rocks found as veneer?
because they layer above igneous rocks
How extrusion forms?
An extrusion is an igneous rock layer formed when lava flows onto Earth's surface and hardens. Extrusions are always younger than the rocks below it.
How does the age of a rock layer compare with an igneous intrusion that is through it or an igneous rock extrusion above it?
If it is above it, the rock layer came after the intrusion. if the intrusion went through the rock layer is older because they layer had to be there in order for the intrusion to go through.
How is it that crosscuting feature is always younger than the rock layer it cuts across?
A crosscutting feature is always younger than the rock layers it cuts through because the feature always forms after the rock layers have been formed, making the rock layers older.
Is a layer younger or older than the layers it cuts through?
A fault is necessarily younger than faults it cuts through; it could not have happened if the layers were not there first.
What geologic law is applied if an igneous intrusion is observed through a layer of sedimentary rock?
law of crosscutting relationships.
Is an extrusion older or younger than the rock layer below it?
Extrusion is older than intrusion because, an extrusion is always younger than the rocks below it. An intrusion is always younger than the rock layers around and beneath it. Hope the answers correct ;)
Explain that folding faulting and uplifting can rearrange the rock layers so the youngest is not always found on top?
Whenfolding, faulting, and uplifting occurs, the youngest rock layer can not always be on top. With folding the oldest rock layer could get folded over on top of a younger layer. When faulting occurs a younger rock layer can become "lower" or pushed more down in the rock layers that was originally shown. When these things happen, then rock layers can become out of order and the youngest layer is not always on the top of the layer.
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.
How can igneous rock disturb sedimentary rock layers?
Igneous rocks can disturb sedimentary rock layers and formations by their movement during ascent through such layer. when they make contact with this sedimentary rocks they could result to folding and/or metamorphism.
How are the laws of superposition and crosscutting relationship used to determine the relative 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.
What layer of the earth is composed of igneous metamorphic and sedimentary rock?
The crust.
What layer of the earth is thin chemically complex?
The thinnest layer of the earth is the outer layer, or the crust. It is made up of sedimentary, metamorphic and igneous rock.
