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Geologic Time

Horizontales
Principle that in undisturbed rock layers, the oldest rocks are on the bottom
Preserved remains or evidence of past living organisms
Age of rocks and geologic features compared with others nearby
Principle that sediments are deposited in large , continuous sheets in all lateral directions
Many species disappearing from earth within a short time; mass ___________
Verticales
Principle stating that geologic processes that occur today are similar to those that occurred in the past
Piece of an older rock that becomes part of a new rock
Principle that if one geologic feature cuts across another feature, the feature it cuts across is older
Numerical age of a rock or feature