| Author | : John Chapman Frye |
| Publisher | : |
| Total Pages | : 30 |
| Release | : 1968 |
| Genre | : Geology |
| ISBN | : |
The Wisconsinan Stage and its Altonian, Farmdalian, Woodfordian, Twocreekan, and Valderan Substages are described as time-stratigraphic units of the Pleistocene of Illinois and Wisconsin.
| Author | : John Chapman Frye |
| Publisher | : |
| Total Pages | : 22 |
| Release | : 1968 |
| Genre | : Geology |
| ISBN | : |
The Wisconsinan Stage and its Altonian, Farmdalian, Woodfordian, Twocreekan, and Valderan Substages are described as time-stratigraphic units of the Pleistocene of Illinois and Wisconsin.
| Author | : Geological Survey (U.S.). Water Resources Division |
| Publisher | : |
| Total Pages | : 810 |
| Release | : 1971 |
| Genre | : Stream measurements |
| ISBN | : |
| Author | : |
| Publisher | : |
| Total Pages | : 1168 |
| Release | : 1957 |
| Genre | : Geology |
| ISBN | : |
Issue identified as 1935 covers names used through Dec. 1935.
