Introduction. Since the first expedition in 1891 to the lofty Pine Ridge tablelands of Sioux county, Nebraska, which led to the discovery of the Daemonelix beds, annual expeditions to the same fields have become possible through the liberal patronage of the Honorable Charles H. Morrill, of Lincoln. To his generosity must be accredited the progress made in the study of these beds which we are now enabled to report.
Below Pine Ridge lie the well known H at Creek badlands in the Miocene formation. The topography here is characteristic of a clay region subject to excessive erosion. It is typical badland.
Overlying it and rising above it by nearly vertical walls, 1,000 to 1,200 feet in height, is the Pine Ridge tablelands. Here the sands of the Loup Fork Tertiary, in which Daemonelix is found, are cut into bluffs, buttes, blowouts, and precipitous canyons.
Some four or five hundred square . . .
- © 1896 Geological Society of America