Gatuncillo Formation
Jump to navigation
Jump to search
| Gatuncillo Formation | |
|---|---|
| Stratigraphic range: Middle-Late Eocene | |
| Type | Formation |
| Underlies | Caimito, Bohío & Panama Formations |
| Overlies | Cretaceous basement |
| Thickness | 150–800 m (490–2,620 ft) |
| Lithology | |
| Primary | Mudstone, siltstone |
| Other | Limestone, sandstone, conglomerate |
| Location | |
| Coordinates | Lua error in Module:Coordinates at line 489: attempt to index field 'wikibase' (a nil value). |
| Approximate paleocoordinates | Lua error: callParserFunction: function "#coordinates" was not found. |
| Region | Panamá Province |
| Country | Panama |
| Extent | Panama Basin |
| Type section | |
| Named for | Gatuncillo River |
| Named by | Thompson |
| Year defined | 1944 |
  Gatuncillo Formation (Panama) | |
The Gatuncillo Formation (Tgo)[1] is a geologic formation in central Panama. The formation is exposed in the Panama Canal Zone and surrounding areas. It preserves fossils dating back to the Middle to Late Eocene period.[2]
Description
[edit | edit source]The Gatuncillo Formation is the oldest sedimentary unit of the Panama Canal Zone, unconformably resting on Cretaceous basement. The formation was defined as Gatuncillo Shale by Thompson in 1944, who named it after the Gatuncillo River. The estimated thickness ranges from 150 to 800 metres (490 to 2,620 ft).[3]
Though the Gatuncillo consists chiefly of mudstone and siltstone, it includes bentonitic mudstone, sandstone, and limestone, and at the base a conglomerate of variable thickness.[4]
Fossil content
[edit | edit source]See also
[edit | edit source]References
[edit | edit source]- ^ Geologic Map, 1980
- ^ Gatuncillo Formation at Fossilworks.org
- ^ Woodring, 1957, p.13
- ^ Woodring, 1957, p.14
- ^ Erdei et al., 2018, p.186
- ^ Cadena et al., 2012, p.549
Bibliography
[edit | edit source]- Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).