Madera Group | |
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Stratigraphic range: | |
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.