Les Arihood, Scientist Emeritus, U.S. Geological Survey (USGS), for his assistance in interpreting water-well drillers' records for the lithologic database and Sue Kahle, USGS hydrologist, for her contribution to the discussion of glacial geology in the northwestern United States. Finally, we thank Tom Nolan, USGS hydrologist, for his application of the dendrogram analysis in the comparison of sediment and aquifer characteristics of hydrogeologic terranes.
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