Madera Group
| Madera Group | |
|---|---|
| Stratigraphic range: | |
Madera Group limestone beds in the San Pedro Mountains, New Mexico | |
| Type | Group |
| Sub-units | Gray Mesa Formation, Atrasado Formation |
| Underlies | Abo Formation, Bursum Formation |
| Overlies | Sandia Formation |
| Thickness | 390 m (maximum subsurface) |
| Lithology | |
| Primary | Limestone |
| Location | |
| Coordinates | 35°13′23″N 106°22′44″W / 35.223°N 106.379°W |
| Region | New Mexico |
| Country | United States |
| Type section | |
| Named for | Town of La Madera, New Mexico |
| Named by | Charles Rollin Keyes |
| Year defined | 1903 |
Outcrops of Madera Group in New Mexico | |
The Madera Group is a group of geologic formations in northern New Mexico. Its fossil assemblage dates the formation to the middle to late Pennsylvanian period.