Bromide Formation
| Bromide Formation | |
|---|---|
| Stratigraphic range: early Sandbian 461–458 | |
| Type | Geological formation |
| Unit of | Simpson Group |
| Sub-units | Mountain Lake Member, Pooleville Member |
| Underlies | Viola Formation |
| Overlies | Tulip Creek Formation |
| Thickness | 71 meters (233 ft) Pooleville Member at type location. |
| Lithology | |
| Primary | limestone |
| Other | limestone interbedded with shale, and sandstone |
| Location | |
| Coordinates | 34°00′N 97°00′W / 34.000°N 97.000°W |
| Region | Central-South Oklahoma: Carter County, Johnston County, Murray County and Pontotoc County |
| Country | United States of America |
| Extent | from Blount to Decorah |
| Type section | |
| Named by | Ulrich, 1911 |
The Bromide Formation is a geological formation in Oklahoma, USA. It is well known for its diverse echinoderm and trilobite fossil fauna.