Skip to content

Geology topics

Mary Grace Wilmarth

Publications and source records attributed to Mary Grace Wilmarth.

2 recordsLinked to original sources

USGS1931

Names and definitions of the geologic units of California

Explore the source record for details and available documents.

Bulletin↗

USGS1925

The geologic time classification of the United States Geological Survey compared with other classifications, accompanied by the original definitions of era, period and epoch terms

No abstract available.

Bulletin↗