How are cross cutting relationships used in relative dating Ipad to ipad sex chat
Cross cutting relationships help geologists use geologic features such as faults and intrusions along with rock layers to determine which layers and features are oldest and which are youngest.
Again, geologists can determine relative ages, but not exact ages using this method.
Microscopic cross-cutting relationships are those that require study by magnification or other close scrutiny.
For example, penetration of a fossil shell by the drilling action of a boring organism is an example of such a relationship.
In a similar example, an impact crater excavates into a subsurface layer of rock.
Cross-cutting relationships may be compound in nature.
The rocks at the bottom had to have been there before the rocks on top of them could be deposited.
A great example of this can be seen at the Grand Canyon.
Megascopic cross-cutting relationships are features like igneous dikes, as mentioned above, which would be seen on an outcrop or in a limited geographic area.
The rock layer E is younger than D because it cuts through D and is the top layer of rock.