1. Bedrock geologic map showing thickness of overlying Quaternary deposits, Lincoln quadrangle and part of Nebraska City quadrangle, Nebraska and Kansas Yale Public content 1972. 2012-11-19T15:41:22Z. 2022-12-08T04:41:03Z. Geological Survey (U.S.). Interior-Geological Survey. English. Public. Nebraska, Lincoln Region, and Nebraska City Region.