Geologic Timescale

Title

Geologic Timescale

Description

Simple scale showing the division and chronology of geologic time as it is understood in North America. The Devonian Period occurred from roughly 410-360 million years ago, though opinions differ on the exact years.

Source

Decade of North American Geology

Publisher

United States Geological Survey, National Park Service, Department of the Interior

Date

2000

Format

image/gif
12kB

Language

US-en

Type

image

Coverage

North America, Prehistory

Files

geoltimebwUSGS.gif

Citation

“Geologic Timescale,” Winifred Goldring, State Paleontologist, accessed November 24, 2017, http://goldring.omeka.net/items/show/3.