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Chapter 4 lesson 2 vocab

Across
A break in Earth's crust along which rock moves.
The geological principle that states in horizontal layers of sedimentary rock.
The age of a rock compared to the ages of other rocks.
An igneous rock layer formed when lava flows onto Earth's surface and hardens.
Down
Fossils of widely distributed organisms that lived during a geological short period.
A gap in geologic record that shows where rock layers have been last due to erosion.
The age of a rock given as the number of years since the rock formed.
An igneous rock layer formed when magma hardens beneath Earth's surface.