News Articles and Ephemera
| Title: | Geology Of The Delaware Valley |
|---|---|
| Author: | Richards, Horace G. |
| Source: | Mineralogical Society of Pennsylvania |
| Date: | 1956 |
| Folder/Item #: | Geology; 4 |
| Notes: | |
| Abstract: | Review of the various geological formations in the Delaware Valley and some of the latest opinions on their age and correlation |