1. Preliminary geologic map of the Tetons quadrangle and adjacent part of the Observation Knoll quadrangle, Beaver and Iron Counties, Utah [cartographic material] Yale Public content 1982. 2002-06-01T04:00:00Z. 2023-05-26T03:01:26Z. Geological Survey (U.S.). The Survey. English. text. Public. Utah, Beaver County, Iron County, Beaver County (Utah), and Iron County (Utah).