Yecua Formation
| Yecua Formation | |
|---|---|
| Stratigraphic range: Late Langhian-Early Messinian (Colloncuran-Huayquerian) ~ | |
| Underlies | Tariquia Formation |
| Overlies | Petaca Formation |
| Thickness | ~50–300 m (160–980 ft) |
| Lithology | |
| Primary | Mudstone, Sandstone |
| Other | Gypsum |
| Location | |
| Region | Chaco Basin |
| Country | Bolivia |
The Yecua Formation is a geological Formation in what is now Bolivia. Studies suggest that the Yecua Formation preserves a coastal setting with humid to semiarid floodplains, shorelines and tidal as well as shallow marine environments including marshes, streams, lakes and brackish bodies of water. There may have been a connection to the Amazon Basin or the Paranaense Sea.