Subject: Unconformities (Geology) - Yale University Library GeoBlacklight Search Results

Start Over Subject Unconformities (Geology)

1. Maps showing distribution of erosional clasts on the middle Jurassic J-2 unconformity in the western interior of the United States

1998. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; For sale by Information Services. English. Public. West (U.S.).

2. The lower Pennsylvanian unconformity in the central Appalachian Basin [cartographic material]

1999. 2002-06-01T04:00:00Z. 2016-07-16T21:16:14Z. Geological Survey (U.S.). U.S. Geological Survey ; For sale by U.S. Geological Survey, Information Services. English. cartographic image. Public. Appalachian Basin, United States, and Appalachian Basin. Pennsylvanian and From 280 to 310 million years ago.