| Introduction |
| 661.01 | Introduction to geology and mineralogy |
| Photography and geological change |
| 661.02 | Charles Lyell on Niagara Falls (1845) |
| Volcanic eruptions |
| 661.03 | Volcanoes and volcanic eruptions |
| 661.04 | Alphonse Bernoud & Claude Grillet: Italy: Earthquake damage (1857-1858) |
| 661.05 | Giorgio Sommer: Eruption of Vesuvius (1872) |
| 661.06 | Giorgio Sommer: Pompeii |
| 661.07 | Giorgio Sommer: The ash-covered remains from Pompeii |
| Geological features |
| 661.08 | Geysers |
| 661.09 | Glaciers |
| 661.10 | Fjords |
| 661.11 | Rock formations |
| Locations |
| 661.12 | Utah: Devil's Slide |
| 661.13 | California: Yosemite Valley |
| Photographers |
| 661.14 | Exhibitions: 1855 Crystal Palace - Models of Extinct Animals |
| 661.15 | William England: Views of Switzerland [Series] |
| 661.16 | Richebourg: Carte geologique detaillee de la France, Feuille 48.- Paris (1879) |
| 661.17 | Joshua Crissman: Yellowstone National Park, illustrated by 122 views. (ca 1876) |
| 661.18 | Charles Waldack, Proctor & O'Shaughnessy: Mammoth Cave, Kentucky (1866) |
| 661.19 | Mandeville Thum: Mammoth Cave, Kentucky (ca 1876-1877) |
| 661.20 | William Bell: U.S. War Dept., Corps of Engineers; Geographical Explorations and Surveys West of 100th Meridian, Expedition of 1872; Lieut. Geo. M. Wheeler, commanding. / Geological Series [Stereoviews] |
| 661.21 | Ben Hains: Views of Mammoth Cave and vicinity (1889) |
| 661.22 | Martin Kriz: Moravian Karst region - subterranean photography |
| 661.23 | Unidentified photographer: Postojna Cave [present-day Slovenia] (1890) |
| 661.24 | Joseph Burr Tyrrell: Expedition to the barren lands (1893) |
| 661.25 | Charles Spencer: New Zealand: Volcanic landscapes (1886) |
| 661.26 | George Dobson Valentine: New Zealand |
| 661.27 | Brett Weston: Lava abstractions |
| Palaeontology and evolution |
| 661.28 | Evolution and the Biblical flood |
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