Subject: Formations (Geology) / Format: cartographic image - Yale University Library GeoBlacklight Search Results

1. Bedrock geologic map of the Black Hills 1:24,000 quadrangle, Nevada [cartographic material]

1986. 2002-06-01T04:00:00Z. 2023-10-31T03:01:42Z. Geological Survey (U.S.). The Survey : [Books and Open-File Reports Section, distributor]. English. cartographic image. Public. Nevada.

2. Preliminary charts of selected structure & thickness maps and diagrams from the Powder River Basin, Wyoming & Montana [cartographic material]

1986. 2023-10-27T18:18:10Z. 2023-10-28T03:02:26Z. Geological Survey (U.S.). The Survey : [Books and Open-file Reports Section, distributor]. English. cartographic image. Public. Powder River Basin (Wyo. and Mont.), United States, and Powder River Basin.

3. Preliminary geologic map of the Sedona 30' by 60' quadrangle, Yavapai and Coconino counties, Arizona [cartographic material]

1986. 2002-06-01T04:00:00Z. 2023-10-20T03:01:40Z. Geological Survey (U.S.). The Survey : [Books and Open-File Reports Section, distributor]. English. cartographic image. Public. California.

4. The Maquoketa Formation (Upper Ordovician) in Iowa [cartographic material]

1971. 2018-04-20T18:43:31Z. 2021-05-04T22:29:48Z. Parker, Mary Combs. Iowa Geological Survey. English. cartographic image. Public. Iowa and Iowa. Ordovician and From 425 to 500 million years ago.