Browse Items (9774 total)

Medicine Bow Mts Section on Page 107 of James Thornton's 1925 Wyoming Trip Geological Field Book illustrate the Pre-Cambrian foundation and Paleozoic layers as a key data point.

The Oil Domes map on Page 102 of James Thornton's 1925 Wyoming Trip Geological Field Book capture the Upper Cretaceous period identified as a key data point.

Cenozoic, Mesozoic, Paleozoic Diagram on Page 85 of James Thornton's 1925 Wyoming Trip Geological Field Book.

Faded Observation Notes on Page 63 of James Thornton's 1925 Wyoming Trip Geological Field Book. Highlights include Canyon very different from others; at head + foot typical V-shaped. In middle like glacier trough, but no glacier deposits. On floor…

Scan of faded lecture notes made by James Thornton in his 1925 Wyoming Trip Geological Field Book. These notes appear on page 63. Highlights from his notes include: From Plains to Great Basin; From Rio Grande to International Boundary. History of…

Block Diagram of Southern Wyoming and Northern Colorado found on Page 60 of James Thornton's geological field book documenting his 1925 trip to Wyoming.

Scan of faded lecture notes made by James Thornton in his 1925 Wyoming Trip Geological Field Book. These notes appear on page 59. Some highlights include Genesis, Epeirogenic = continent making, Orogenic = mountain making as well as the following…

Page 50 of James Thornton's geological field book documenting his 1925 trip to Wyoming titled Section from Tatam Ranch to Camp and showing a couple of his illustrations of sections he studied.

This is a digital copy of page 49 of James Thornton's 1925 Wyoming Trip geological field book. Pages 13–15 and 49 were selected for the timeline because it is thought that they provide detailed sketches of the Permian (Lyons, Satanka) and Triassic…