| Title | Reva Gap-Battle Ship Rock |
| Description | This is a close-up of the unconformity between the Chadron and Brule formations. This shows evidence of paleoslumping. The Chadron is the pink areas and the Brule is the white horizontal rock. |
| Location | USA ▹ South Dakota. Battle Ship Rock. |
| Photographer | Joseph Hartman. 2002-01-09. |
| Collection | Joseph Hartman PO2222. |
| Key words | reva gap, chadron, brule, battle ship rock, paleoslumping |
| Tech details | 162 KB. Outcrop. Kodachrome, TIFF format. |
| GeoDIL number | 1941 |
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