Sabinal Formation
| Sabinal Formation | |
|---|---|
| Stratigraphic range: | |
| Type | sedimentary |
| Unit of | Tlaxiaco Basin |
| Underlies | Tlaxiaco Formation |
| Overlies | Consuelo Group, Tecocoyuncan Group |
| Lithology | |
| Primary | Shale |
| Other | Mudstone, wackestone, marl |
| Location | |
| Coordinates | 17°18′N 97°42′W / 17.3°N 97.7°W |
| Approximate paleocoordinates | 11°36′N 49°42′W / 11.6°N 49.7°W |
| Region | Oaxaca |
| Country | Mexico |
The Sabinal Formation is a Late Jurassic and Early Cretaceous-aged geological formation in Oaxaca, Mexico. It preserves a highly diverse marine fauna.
It was initially thought to only encompass the Late Jurassic (Kimmeridgian & Tithonian), but more recent studies have redefined it to cover the earliest Cretaceous (Berriasian & Valanginian) as well. It is part of the Tlaxiaco Basin, a prominent structural basin in southern Mexico that accumulated both continental and marine sediments between the Early Jurassic and the Paleogene. The most prolific site of the formation is the Kimmeridgian-aged Llano Yosobe site near Tlaxiaco.