Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
Yorktown Formation  | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Cenozoic | |
| ...Neogene | |
| ....Pliocene | |
| .....Yorktown Formation | |
| RT | South Carolina |
| Virginia | |
| North Carolina | |
| Maryland | |
| Chesapeake Group | |
| SN | In Chesapeake Group. Divisible into 2 major zones. Zone 1 (at base) corresponds to beds exposed at Raysor Bridge, South Carolina; Zone 2 (upper) includes: Uppermost Yorktown beds at Suffolk, Virginia, the beds at Yorktown, Virginia, and the Chama-bearing |