The Igneous intrusions and extrusions near sedimentary layers.
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.
sedimentary
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A fossil is any record of an organism preserved in rock, whether it be igneous, sedimentary, or metamorphic. Nearly all fossils are discovered in sedimentary rock.
yes fossils are found in sedimentary rocks but not in igneous and metamorphic rocks. hope this helps
A scientist could use radiometric dating methods, such as carbon dating or potassium-argon dating, to determine the absolute age of a fossil found in a sedimentary rock. These methods rely on the decay of radioactive isotopes within the rock surrounding the fossil to calculate its age.
== == The age of a sedimentary rock formation can be estimated by comparing it to radiometrically dated rock formations that contain the same fossil organisms. Geologic time categories have been identified according to the radiometric dating of fossils and the fact that they appear only in certain time periods. Therefore, if you look at a rock formation and find a trilobite fossil that has been identified by previous dating techniques as Cambrian, you can be fairly certain that the formation you are looking at is also Cambrian.
The type of rocks that contain fossil fuels are sedimentary rocks, such as shale, sandstone, and limestone. Fossil fuels like oil, natural gas, and coal are formed from the remains of plants and animals that were buried and compressed over millions of years within these rocks.
fossil rock has to be sedimentary, never igneous nor metamorphic, it contains dead very old plants, creatures any kind..... and that suggests a suitable environment for preservation; quick burial and no air existence also not a very high temperature to keep the shape of the fossil.
It is conceivable that a fossil could be found among sedimentary rock crystals, and some dead organisms have actually been replaced by minerals which are composed of crystals. Fossils in gems and crystals from metamorphic or igneous processes--no.
They have a lot of fossil fuels due to the rock(which i believe is either Sedimentary, or Metamorphic and Igneous). They have to drill holes in the rocks to find the minerals and fuel.