Sedimentary rocks dating sex dating in pettibone north dakota
Much like the principle of cross-cutting, the Principle of Inclusions relatively dates objects based on their placement within other earth materials.
Once a rock is lithified no other material can be incorporated within its internal structure.
The principle of cross-cutting states that any geologic feature that crosses other layers or rock must be younger then the material it cuts across.
For example, in order to get a pebble inside an igneous rock it must be incorporated when the igneous rock is still molten-- such as when lava flows over the surface.
If we know how old the volcanic layers are, then we have a general idea of how old the sedimentary layer…