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Principle of Orginal Horizontality
Sedimentary and Volcanic rocks are usually originally deposited horizontal layers.
if there are tilts or folds, this must have happened later, after they were laid down in a horizontal layer.
Cross-Cutting relationship
if an igneous rock fault or erosional surface cuts across a pattern of rocks those rocks must be older than the thing that cut them.
Superposition
In undisturbed sedimentary or volcanic tocks, the oldest is on the bottom. Rocks pile up as they are formed.
Author
Anonymous
ID
150435
Card Set
Sunny Bun
Description
Geog 8 quiz
Updated
2012-04-27T06:57:42Z
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