Temporal Coverage: From 425 to 500 million years ago / Language: English - Yale University Library GeoBlacklight Search Results

Start Over Temporal Coverage From 425 to 500 million years ago Language English

1. Lithofacies and stratigraphic nomenclature of part of the Upper Ordovician section of Kentucky [cartographic material]

1979. 2014-09-10T17:26:37Z. 2021-06-01T21:36:14Z. Weir, Gordon W. (Gordon Whitney), 1922-2011. U.S. Geological Survey. English. Public. Kentucky and Kentucky. Ordovician and From 425 to 500 million years ago.

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.