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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.
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 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.
Which numbered rock layers are younger than the ignewous intrusion layer?
To determine which numbered rock layers are younger than the igneous intrusion layer, you would need to refer to a specific geological cross-section or diagram. Generally, in geology, igneous intrusions are younger than the surrounding sedimentary layers because they form after the existing layers have been deposited. Therefore, any rock layers that are located above the igneous intrusion in the stratigraphic sequence would be considered younger.
What a cross cutting relationship?
Cross cutting relationships define rock formations in geology. When magma enters cracks and crevices in existing rocks and cools it forms what is called an igneous intrusion. The principal of cross cutting relationships means that the igneous intrusion is always younger than the rock it cuts across.
Is an intrusion younger than its surrouding rock layers?
An intrusion is younger than its surrounding rock layers. An intrusion needs another rock to cut through it, which is referred to as a cross-cutting relationship.
What do an intrusion and an extrusion tell us about the rock layers?
(Intrusion) You can learn how old the rock layers are around it. the rock layers around under and all around the intrusion are always older than the intrusion itself. (EXTRUSION) the layers of rock bellow the extrusion is older than the extrusion.
Why are the rocks in a large igneous intrusion coaser grained than the rocks in a small igneous intrusion at the same depth?
The minerals had longer to form from the hot magma than did the minerals in the small intrusion, which would have cooled much faster.
When there is an igneous intrusion and a fault line which one is younger?
That depends! If the fault line cross cuts the igneous intrusion causing the intrusion to be displaced on either side of the fault and forming a broken mass of rock within the intrusion known as a fault breccia then the fault is younger than the intrusions, as the intrusion must have already existed for the fault to cause it's displacement. If on the other hand the igneous intrusion cross cuts the fault and is un-deformed then it is probable that it is younger than the fault.
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.
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.
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 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 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.
How does an intrusive form?
An intrusion is the injection of one material into another. To form, one material has to be more fluid than the other (eg mud, water or magma) so that it behaves hydraulically, while the more solid material can be fractures and forced apart by the more fluid material. When this happens the fluid material forces its way into the solid material as an intrusion.
How do you know that an intrusion is younger than its surrounding rock layers?
An intrusion is younger than its surrounding rock layers if it cuts across them. This is because the intrusion must have been deposited after the surrounding layers were already in place. Additionally, any fossils or index minerals found in the intrusion would be younger than those in the surrounding rock layers, providing further evidence of relative age.
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