Relative dating rock quiz
To review our principles of relative dating as applied to such geologic cross-sections, we will make use of a neat learning tool available on the Internet.
"Athro Limited" is a private company which provides education modules on the Internet.
Include all the events which can be inferred from the drawing.
List which relative dating principles apply to the order of each event.
In the next lab, we will learn how to use local geologic information from outcrops to begin to build such regional geologic maps and geologic cross-sections, but for now we just want to practice how to read them.
This is not labeled as such -- but see how the rocks at the bottom of the profile have been tilted while the younger rocks on top are horizontal.We have seen that a cliff or a road cut is a local "geologic cross-section" -- a side view of the geology at one location.As geologists piece together the information at various outcrops, they can begin to assemble a "geologic map" (like a road map) of an entire region (consisting of many square miles).This map displays the large-scale (also called "regional") geologic features they have inferred are present beneath the landscape.Along with these geologic maps, we can reconstruct a regional geologic cross-section which would be like a great "geologic slice" through the landscape.