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What is the relative age of fault or igneous intrusion that cuts through an unconformity?
If a fault or intrusion cuts through an unconformity, the fault or intrusion is younger than all the rocks it cuts through above and below the unconformity.
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What is the relative age of a fault or igneous intrusion that cuts through an unconformity?
The relative age of a fault or igneous intrusion that cuts through an unconformity is younger than the unconformity but older than the rock it cuts through. This is because the fault or intrusion must have formed after the deposition of the rock layers below the unconformity but before the deposition of the rock layers above the unconformity.
What geologic law is applied if an igneous intrusion is observed through a layer of sedimentary rock?
The principle of cross-cutting relationships is applied in this case. It states that the intrusion must be younger than the sedimentary rock it cuts through, as the igneous rock is "cutting across" pre-existing layers. This helps in determining the relative ages of the rocks involved.
What is an intrusion in science terms?
Intrusive is a term that applies to igneous rocks that form from magma underground such as granite.
Why is igneous rock always younger than the rock layer it cuts through?
Igneous rock is always younger than the rock layer it cuts through because of the principle of cross-cutting relationships in geology. When magma intrudes into pre-existing rock layers and solidifies, it disrupts those layers, indicating that the intrusion occurred after the formation of the surrounding rock. Therefore, any igneous rock that penetrates or cuts through sedimentary layers must be younger than those layers. This principle helps geologists determine the relative ages of rock formations.
What granite intrusion crosses a thick sandstone bed which is older and what law is it?
The granite intrusion that crosses a thick sandstone bed is an example of an igneous intrusion that is younger than the sandstone. This relationship is explained by the Law of Cross-Cutting Relationships, which states that geological features that cut through other rocks must be younger than the rocks they cut through. Thus, the granite intrusion is considered younger than the sandstone bed it intersects.
What is the relative age of a fault or igneous intrusion that cuts through an unconformity?
The relative age of a fault or igneous intrusion that cuts through an unconformity is younger than the unconformity but older than the rock it cuts through. This is because the fault or intrusion must have formed after the deposition of the rock layers below the unconformity but before the deposition of the rock layers above the unconformity.
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.
What are the relative ages of igneous intrusion and overlying sedimentary rock layers that dome upward?
The igneous intrusion is typically younger than the overlying sedimentary rock layers in a dome structure. The intrusion must have occurred after the deposition of the sedimentary layers and caused them to deform and dome upward due to the force of the molten rock pushing through.
What geologic law is applied if an igneous intrusion is observed through a layer of sedimentary rock?
The principle of cross-cutting relationships is applied in this case. It states that the intrusion must be younger than the sedimentary rock it cuts through, as the igneous rock is "cutting across" pre-existing layers. This helps in determining the relative ages of the rocks involved.
What is the The age of an intrusion of igneous rock in relation to the sedimentary rock layers through which it passes?
It is younger.
What is the age of an intrusion of igneous rock in relation to the sedimentary rock layers through which it passed?
It is younger.
What is the age of an igneous intrusion in relation to the sedimentary rock layers it passes through?
It is younger than them.
When magma rises what geological formation can result?
If it has broken through the Earth's crust then it would be a igneous extrusion and a volcano can form. If it hasn't complete broke through the crust it would be a igneous intrusion. Depending if the intrusion was concordant or discordant with the bedding planes it would be either a sill or a dyke.
How does igneous intrusion end up as a hill?
Basically, igneous intrusion involves the solidifying of magma when it cools in the crust of the Earth. When magma rises through the crust, it intrudes into the existing sedimentary rock layers and forms a hill. The surounding rock may be more prone to erosion and wear away leaving the intrusion jutting above the (eroded) surroundings.
What clue tells geologists intrusion?
A clue that tells geologists about an intrusion is the relationship between the rock layers. An intrusion is younger than the surrounding rocks it cuts through, so if the intrusion appears to cut across existing layers, it is likely an intrusion. Additionally, the mineral composition and texture of the intrusion can differ from the surrounding rocks, providing further evidence of an intrusion.
Is Devils Tower igneous?
Yes, Devils Tower is an igneous rock formation. It is considered to be a laccolithic butte, formed by the intrusion of igneous material into overlying sedimentary rocks and subsequently exposed through erosion.
Earth science define cross cutting?
Sometimes magma pushes, or intrudes, into cracks in existing rocks. When the melted rock cools and solidifies, the resulting feature is called an igneous intrusion. This image shows metamorphic rock in Death Valley, California, cut by a darker igneous intrusion. The principle of cross-cutting relationships states that an igneous intrusion is always younger than the rock it cuts across.
