1. The Chinle (Upper Triassic) and Sundance (Upper Jurassic) Formations in north-central Colorado Author/Creator: Pipiringos, G. N. 1918- (George Nicholas) Publication/Creation: Washington : U.S. Govt. Print. Off, 1969 Resource Type: Book Is Part Of: U.S. Geological Survey bulletin, no. 1274. Access & Availability: Loading
2. The Chinle (Upper Triassic) and Sundance (Upper Jurassic) Formations in north-central Colorado : a description of hitherto unreported or little-understood stratigraphic and paleontologic details of marine Jurassic and Upper Triassic rocks of a scantily studied area Author/Creator: Pipiringos, G. N. 1918- (George Nicholas), author Publication/Creation: [Washington, D.C.] : United States Department of the Interior, Geological Survey, 1969 Resource Type: Book Access & Availability: Loading
3. Correlation of middle Jurassic San Rafael group and related rocks from Bridgeport to Ouray in western Colorado Author/Creator: O'Sullivan, Robert Brett, 1923- Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2004 Resource Type: Map Edition: Version 1.0. Access & Availability: Loading