The Utah Geological Survey has a good supply of Maps and data available online and some online maps. They also have an online Blog. The GIS data is a fairly complete package–the sample I downloaded included .pdfs, shapefiles, layer files, images and ArcMap project (.MXD) files used to generate the .pdfs. File sizes are larger because of the completeness. Feature classes have a moderate level of attribution. The highlight, however, are the sample Keyhole Markup (KMZ) files of the of the St.

The South Dakota Geological Survey website provides some good base data–imagery, DRGs, DEMs, and DLGs. There is a searchable database of core cuttings and the state data server has bedrock data for the eastern portion of the state and a statewide layer, presumably surficial geology, called geology. Quad-based geological maps are also available (PDF format) in the Publications and Maps section. The data I downloaded was in shapefile format with minimal attribution.

Took a quick look at the North Dakota Geological Survey’s website for GIS data. The only data I found served directly from their website was surface geology map .pdfs for some 24k and 100k maps. Also available is a search for Oil & Gas wells although I did not see the data was downloadable. Some other publications have .pdfs that can be downloaded. The North Dakota Hub Explorer serves as the state’s official data portal including for GIS data.