Enciso Group
Spanish geological formation
The Enciso Group is a geological formation in La Rioja, Spain whose strata date back to the Early Cretaceous.
The turtle Camerochelys was described from the Enciso Group. Dinosaur remains, including the holotype of the spinosaurid Riojavenatrix, are among the fossils that have been recovered from the formation.
The first spinosaurid fossil remains found at Igea, Enciso Group were a jaw fragment found in 1983 and isolated teeth.
01Description
The Cameros Basin containing the Enciso Group represents continental synrift deposition. It consists of carbonate and siliciclastic lacustrine deposits. Cobble to boulder-sized dropstones and sand to silt sized IRD were observed in three different lithofacies. These are restricted glaciolacustrine shales, laminated glaciolacustrine silts, and proglacial sandy lobes correlated to glacier front retreat. This deep glacial lake system is compared favourably lacustrine sediment sequences related to Pleistocene glacial cycles of the Laurentide Ice Sheet in the eastern Canadian Arctic. This along with other evidence of cryospheric activity suggested extensive continental ice sheets during the Hauterivian Cold Snap.
02Fossil content
The following fossils have been found in the formation:
Color key
|
Notes Uncertain or tentative taxa are in small text; crossed out taxa are discredited. |
Dinosaurs
Ornithischians
| Ornithischians of the Enciso Group | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Styracosterna Indet. | Indeterminate | |||||
Theropods
| Theropods of the Enciso Group | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Riojavenatrix | R. lacustris | A baryonychine spinosaurid | ||||
Turtles
| Turtles of the Enciso Group | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Camerochelys | C. vilanovai | A xinjiangchelyid turtle | ||||
Sources and credits
This article is adapted from the Wikipedia article “Enciso Group”, written by its contributors and licensed under CC BY-SA 4.0. Fathomly has changed the layout, removed citation markers, navigation and maintenance notices, and adjusted punctuation. This adapted version is shared under the same license. For references, see the original article.
Images, from Wikimedia Commons:
- Icnitas en Enciso.JPG by Txo, Public domain
- Riojavenatrix lacustris.png by Ddinodan, CC BY 4.0
- Dinosaur footprints Yacimiento de Valdecevillo Enciso.jpg by tunguska from Logroño, Spain, CC BY 2.0
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