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How can the geologist determine the age of the fossil if the geologist finds a fossil in a layer of sedimentary rock that lies in between 2 igneous extrusions?
Wiki User
∙ 13y ago
The geologist will most likely take samples of the two lavas forming the igneous intrusions and use radiometric dating techniques to find their ages. He then would know that the age of the sedimentary rock was somewhere between the two.
He may also look for (index) fossils within the sedimentary rock which may also give him an indication of the age of the sediment.
Wiki User
∙ 13y ago
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What is an igneous intrusion between two sedimentary rock layers?
A laccolith is an igneous formation between two sedimentary layers
Sandstone is in what class?
Siltstone is a sedimentary rock. It forms on river beds when silt compressed together.
What are the similarities between sedimentary rocks and metamorphic rocks?
They are both rocks
How can you distinguish between a chemical sedimentary rock and a organic sedimentary rock?
A sedimentary organic rock is living or was once living like a coral. Chemical is chemically made and is usually man cut.
What is the cementing material between the grains in a sedimentary rock?
The cementing material could be calcite, clay minerals, iron minerals, or quartz in a clastic sedimentary rock.
Is there a relationship between diagenesis and orogensis?
Orogenesis: The process of mountain formation, especially by a folding and faulting of the earth's crust Diagenesis: The physical and chemical changes occurring during the conversion of sediment to sedimentary rock. So, from one geologist to a non-geologist - I'd say no.
What is the difference between an seismologist and a geologist?
A geologist studies rock formations. A seismologist studies earthquakes.
What is an igneous intrusion between two sedimentary rock layers?
A laccolith is an igneous formation between two sedimentary layers
How do you use lava to learn about the ages of sedimentary rock?
It is fairly easy to determine the age of lava or volcanic ash using radiometric dating, but much harder with sedimentary rock. But, if a layer of sedimentary rock is in between two layers of volcanic rock, then we know if had to have formed after the first layer and before the second one. If we know how old the volcanic layers are, then we have a general idea of how old the sedimentary layer is as well.
What is the difference between a geologist and a gemologist?
A geologist studies rocks, minerals, and physical structure of a particular area. A gemologist studies gems and gemstones.
What does cycle?
cycle means it cycles between sedimentary,metamorphic and igneous rocks. cycle means it cycles between sedimentary,metamorphic and igneous rocks. -Mrs.Zalenski
Sandstone is in what class?
Siltstone is a sedimentary rock. It forms on river beds when silt compressed together.
What are the similarities between sedimentary rocks and metamorphic rocks?
They are both rocks
How can you distinguish between a chemical sedimentary rock and a organic sedimentary rock?
A sedimentary organic rock is living or was once living like a coral. Chemical is chemically made and is usually man cut.
Why portions of the sedimentary rock layers have the symbol for contact metamorphism?
the rock layers were eroded at the interface between the igneous intrusion and the sedimentary rocks.
What is the boundary between two sedimentary rock layers called?
contact
What results from compression between rock layers?
it forms a sedimentary rock
