Geologist must use their knowledge of the events that disturb or remove rock-layer sequences to help piece together the history of Earth as told by the rock record.
Geologist must use their knowledge of the events that disturb or remove rock-layer sequences to help piece together the history of Earth as told by the rock record.
to date a rock layer and other fossils within that layer
no, the relative age
Their ages
petrologist
The geologist is applying the principle of superposition, which states that in an undisturbed sequence of rock layers, the oldest rocks are at the bottom and the youngest are at the top. This helps geologists determine the relative ages of fossils found in different layers of sedimentary rock.
When a rock is disturbed, it usually contains one of the following abnormalities:SlantingBendingFoldingCrackingMetamorphismor Nonconformities.If a rock layer contains none of these, then geologists classify it as undisturbed.
A geologist could tell you what kind of rock that is. I am studying to become a geologist.
A geologist.
Layer A in the figure appears to be the crust, which is the outermost layer of the Earth. It is solid and rigid, composed mainly of rock and divided into the continental and oceanic crust. The crust is the thinnest layer of the Earth, with an average thickness of about 5-70 kilometers.
First step would be relative-dating: examining the new unit in the context of known rocks above and below it. Then look for correlative formations & fossils elsewhere.
A rockhound is a geologist or rock collector.