Subject: Geology, Stratigraphic / Spatial Coverage: Iowa - Yale University Library GeoBlacklight Search Results

Start Over Subject Geology, Stratigraphic Spatial Coverage Iowa

1. Quaternary geologic map of the Des Moines 4⁰ x 6⁰ quadrangle, United States

1991. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). U.S. Geological Survey ; For sale by Map Distribution. English. Public. Iowa and Middle West. Quaternary.

2. 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.