Jagua Formation
| Jagua Formation | |
|---|---|
| Stratigraphic range: Mid-Late Oxfordian ~ | |
| Type | Geological formation |
| Sub-units | Pan de Azúcar, Zacarías, Pimienta & Jagua Vieja Members |
| Underlies | Guasasa Formation |
| Overlies | San Cayetano Formation |
| Thickness | 160 m (520 ft) |
| Lithology | |
| Primary | Shale, limestone |
| Location | |
| Coordinates | 22°42′N 83°36′W / 22.7°N 83.6°W |
| Region | Pinar del Río Province |
| Country |  Cuba |
| Extent | Sierra de los Órganos, Sierra del Rosario |
| Type section | |
| Named for | Jagua |
  Jagua Formation (Cuba) | |
The Jagua Formation is a Late Jurassic (middle to late Oxfordian) geologic formation in the Sierra de los Órganos and Sierra del Rosario mountain ranges in Pinar del Río Province, western Cuba.[1] Plesiosaur, pliosaur, pterosaur,[2] metriorhynchid, turtle and dinosaur remains are among the fossils that have been recovered from its strata.
Description
The formation comprises marine shales and limestones. The 60 metres (200 ft) thick Jagua Vieja Member consists of black shales and horizontally laminated marly micritic to biomicritic limestones. The latter contains calcareous concretions which the fossils are found in.[3] The formation overlies the San Cayetano Formation and is overlain by the Guasasa Formation. The bedding direction is steeply dipping towards the northwest.
Fossil content
Vertebrate paleofauna
| Paleofauna of the Jagua Formation | |||||||
|---|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Description | Notes | Image | |
| Cacibupteryx | C. caribensis | Mogote Jagua Vieja | Jagua Vieja Mb. | A rhamphorhynchid pterosaur | [4] | ||
| Cryptoclidus | C. vignalensis | Laguna de Piedra | Jagua Vieja Mb. | A sauropterygian | [5] | ||
| Gallardosaurus | G. iturraldei | Sierra de Caiguanabo ~8 km (5.0 mi) east of Viñales |
Jagua Vieja Mb. | A pliosaurid | [6] | ||
| Nesodactylus | N. hesperius | Hoyo del Palmar 10 km (6.2 mi) northeast of Viñales |
Jagua Vieja Mb. | A rhamphorhynchid pterosaur | [4] | ||
| Notoemys | N. oxfordensis | Valle de Viñales | A platychelyid pan-pleurodiran turtle, originally described under the separate genus of Caribemys | ||||
| Sphaerodontes | S. caroli | Laguna de Piedra | Jagua Vieja Mb. | An ichthyosaur or a fish | [5] | ||
| Vinialesaurus | V. caroli | Viñales | A cryptoclidid plesiosaur | [7] | |||
| Geosaurus | Puerta de Ancón Sierra de Guasasa |
Jagua Vieja Mb. | A Metriorhynchid | [8] | |||
| Ophthalmosauridae | Ophthalmosauridae indet. | [9] | |||||
| Somphospondyli | Somphospondyli indet. | Material consists of a first or second metacarpal, now lost.[10] | |||||
Other fossils
- Favreina
- Globochaete
- Gryphaea mexicana - Pan de Azúcar Mb.[11]
- Lepidotes gloriae[12]
- Liostrea mairei[13]
- L. sandalina - Zacarías Mb.[14]
- Nanogyra (Nanogyra) nana - Zacarías Mb.[14]
- Ostrea broughtoni - Zacarías Mb.[14]
- Plicatula cf. weymouthiana - Zacarías Mb.[14]
- Voltzia palmeri[15]
- Perisphinctes sp.[16]
See also
References
- ^ Jagua Formation at Fossilworks.org
- ^ Barrett et al., 2008
- ^ Iturralde Vinent & Norell, 1996
- ^ a b Gasparini et al., 2004
- ^ a b Laguna de Piedra at Fossilworks.org
- ^ Gasparini, 2009
- ^ Gasparini et al., 2002
- ^ Gasparini & Iturralde Vinent, 2001, p.538
- ^ Gasparini & Iturralde Vinent, 2001, p.542
- ^ Apesteguía, S.; Ceballos Izquierdo, Y.; Iturralde-VINENT, M. (2019-09-02). "New taxonomic assignment for a dinosaur sauropod bone from Cuba". Historical Biology. 33 (5): 737–742. doi:10.1080/08912963.2019.1661406. ISSN 0891-2963. S2CID 202854022.
- ^ Sierra Ancón at Fossilworks.org
- ^ Hoyo de San Antonio at Fossilworks.org
- ^ Hoyo de la Sierra at Fossilworks.org
- ^ a b c d Mogote La Mina at Fossilworks.org
- ^ Jagua Vieja at Fossilworks.org
- ^ Viñales at Fossilworks.org
Bibliography
- Template:Cite LSA
- Template:Cite LSA
- Template:Cite LSA Archived 2011-07-16 at the Wayback Machine
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