GTS Flashcard

Front

What are fossils that are abundant, easily recognizable, short lived, and widespread called?

Back

Index fossils

Front

Where are most fossils found?

Back

In sedimentary rocks

Front

Marine plants and invertebrates were abundant during which era?

Back

Paleozoic

Front

According to the law of superposition, where are the oldest fossils found?

Back

Near the bottom of the rock layers

Front

Which era is the longest?

Back

Precambrian

Front

What is the definition of a fossil?

Back

A preserved remains or traces of ancient organisms.

Front

What is the significance of index fossils in geology?

Back

They help to date and correlate the age of rock layers.

Front

What type of rock is most commonly associated with fossil formation?

Back

Sedimentary rocks.

Front

What era is known for the dominance of dinosaurs?

Back

Mesozoic.

Front

What is the law of superposition?

Back

In undisturbed rock layers, the oldest layers are at the bottom.