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Correlation of Map Units chart from the Surficial Geologic Map of Yellowstone National Park

By Yellowstone Volcano Observatory 1972 (approx.)
Correlation of Map Units chart from the Surficial Geologic Map of Yellowstone National Park
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Detailed Description

An example Correlation of Map Units chart from the Surficial Geologic Map of Yellowstone National Park (U.S. Geological Survey, 1972) that demonstrates a typical classification scheme for surficial units. For this map, the units are classified by basic deposit type (horizontal axis) and subdivided by age and glacial interval (vertical axis).

Sources/Usage

Public Domain.