Campur Formation
| Campur Formation | |
|---|---|
| Stratigraphic range: Turonian-Maastrichtian | |
| Type | Formation |
| Underlies | Petén Group: Sepur Formation |
| Overlies | Cobán Formation |
| Lithology | |
| Primary | Limestone |
| Other | Dolomite, conglomerate, siltstone |
| Location | |
| Coordinates | 16°00′N 90°30′W / 16.0°N 90.5°W |
| Approximate paleocoordinates | 24°12′N 80°06′W / 24.2°N 80.1°W |
| Region | Alta Verapaz, Petén |
| Country |  Guatemala |
| Extent | Petén Basin |
| Type section | |
| Named for | Campur |
| Named by | Vinson |
| Year defined | 1962 |
  Campur Formation (Guatemala) | |
The Campur Formation (Kca) is a geologic formation of the Petén Basin of northern Guatemala. The subtidal limestone preserves fossils dating back to the Late Cretaceous period.[1]
Description
[edit]The formation consists of fossiliferous limestones with minor levels of dolomites. The formation is rich in rudists and miliolids.[2] Breccias and clayey conglomerates, siltstones and limestones occur in the formation. The formation was probably deposited in a fore-reef environment in an open shelf system.[3] The lower boundary of the Campur Formation is transitional into the underlying Cobán Formation. The formation is overlain by the Sepur Formation of the Petén Group.[4] The Campur Formation is laterally equivalent with the upper part of the Ixcoy Formation of western Guatemala.[5]
Fossil content
[edit]The following fossils have been uncovered from the formation:[6][7]
- Accordiella cf. conica
- Bournonia cardenasensis, B. excavata[8]
- Distefanella lombricalis[9]
- Senalveolina aubouini
- Sulcoperculina sp.
See also
[edit]References
[edit]- ^ Campur Formation at Fossilworks.org
- ^ Machorro Sagastume, 2005, p.11
- ^ Scott, 1995, p.297
- ^ Cuenca Petén - MEM
- ^ Machorro Sagastume, 2005, p.9
- ^ El Ceibo at Fossilworks.org
- ^ Rubelsanto at Fossilworks.org
- ^ Scott, 1995, p.303
- ^ Scott, 1995, p.304
Bibliography
[edit]- Machorro Sagastume, Rudy (2005), Evaluación hidrogeológica de Alta Verapaz (PDF), Universidad de San Carlos de Guatemala, pp. 1–77, retrieved 2019-02-05
- Scott, R.W. (1995), "Cretaceous rudists of Guatemala" (PDF), Revista Mexicana de Ciencias Geológicas, 12: 294–306, retrieved 2019-02-05