Cintura Formation
Geographic formation in Arizona
Cintura Formation | |
---|---|
Stratigraphic range: Albian–Cenomanian PreꞒ Ꞓ O S D C P T J K Pg N | |
Type | Geological formation |
Unit of | Bisbee Group |
Sub-units | Marquechi, San Marcos and San Juan Member |
Thickness | 1,146 meters[1] |
Location | |
Region | Arizona and Sonora |
Country | ![]() ![]() |
Type section | |
Named by | Ransome |
Year defined | 1904 |
The Cintura Formation is a geologic formation in the northeastern Sonora of Arizona and Mexico.[1] It preserves fossils dating back to the Cretaceous period.
Description
The Cintura Formation is divided into 3 stratigraphic members which represent deltaic depositional elements: the basal Marquechi Member, medial San Marcos Member and the uppermost San Juan Member.[1] The delta is thought to have prograded southward and have an immediate source to its north based on paleocurrents and provenance data.[1]
Fossil content
Dinoflagellates | |||||
---|---|---|---|---|---|
Genus | Species | Presence | Material | Notes | Images |
Oligosphaeridium | O. sp. | Base of the Marquechi Member.[2] | Dinoflagellate cysts.[2] |
Plants | |||||
---|---|---|---|---|---|
Genus | Species | Presence | Material | Notes | Images |
cf. Acanthotriletes | cf. A. varispinosus | Base of the Marquechi Member.[2] | Spores.[2] | ||
Alisporites | A. sp. | Base of the Marquechi Member.[2] | Pollen grains.[2] | ||
Araliaephyllum | A. silvapinedae | Near the town of Cabullona, Sonora, Mexico.[3] | A trilobed leaf.[3] | A laurale. | |
Baculatisporites | B. sp. | Base of the Marquechi Member.[2] | Spores.[2] | ||
Cicatricosisporites | C. hallei | Base of the Marquechi Member.[2] | Spores.[2] | A schizaeacean fern. | |
C. sp. | Base of the Marquechi Member.[2] | Spores.[2] | A schizaeacean fern. | ||
Classopollis | C. spp. | Base of the Marquechi Member.[2] | Pollen grains.[2] | A cheirolepidiaceaen conifer. | |
Clavatipollenites | C. tenellis | Base of the Marquechi Member.[2] | Pollen grains.[2] | ||
Cycadopites | C. sp. | Base of the Marquechi Member.[2] | Pollen grains.[2] | ||
Deltoidospora | D. sp. | Base of the Marquechi Member.[2] | Spores.[2] | ||
Ephedripites | E. sp. | Base of the Marquechi Member.[2] | Pollen grains.[2] | ||
Exesipollenites | E. tumulus | Base of the Marquechi Member.[2] | Pollen grains.[2] | ||
Inaperturopollenites | I. sp. | Base of the Marquechi Member.[2] | Pollen grains.[2] | A conifer. | |
Isoetites | I. sp. | San Juan Member.[2] | Leaves.[2] | An isoetalean. | |
Leptolepidites | L. sp. 1 | Base of the Marquechi Member.[2] | Spores.[2] | A fern. | |
L. sp. 2 | Base of the Marquechi Member.[2] | Spores.[2] | A fern. | ||
L. sp. 3 | Base of the Marquechi Member.[2] | Spores.[2] | A fern. | ||
Osmundacites | O. wellmanii | Base of the Marquechi Member.[2] | Spores.[2] | ||
Ovoidites | O. parvus | Base of the Marquechi Member.[2] | Spores.[2] | An aquatic zygnematale. | |
Patellasporites | P. sp. | Base of the Marquechi Member.[2] | Spores.[2] | ||
Perinopollenites | P. sp. | Base of the Marquechi Member.[2] | Pollen grains.[2] | ||
Peromonolites | P. allensis | Base of the Marquechi Member.[2] | Spores.[2] | A fern. | |
Pityosporites | P. sp. | Base of the Marquechi Member.[2] | Pollen grains.[2] | ||
Plicatella | P. potomacensis | Base of the Marquechi Member.[2] | Spores.[2] | ||
Raistrickia | R. sp. | Base of the Marquechi Member.[2] | Spores.[2] | ||
Retimonocopites | R. sp. 1 | Base of the Marquechi Member.[2] | Pollen grains.[2] | ||
R. sp. 2 | Base of the Marquechi Member.[2] | Pollen grains.[2] | |||
Spheripollenites | S. sp. | Base of the Marquechi Member.[2] | Pollen grains.[2] | ||
Taxodiaceaepollenites | T. hiatus | Base of the Marquechi Member.[2] | Pollen grains.[2] | ||
Todisporites | T. minor | Base of the Marquechi Member.[2] | Spores.[2] | ||
Triporoletes | T. sp. cf. T. radiatus | Base of the Marquechi Member.[2] | Spores.[2] | A bryopsid. | |
Tucanopollis | T. sp. | Base of the Marquechi Member.[2] | Pollen grains.[2] | ||
Undulatisporites | U. undulapolus | Base of the Marquechi Member.[2] | Spores.[2] | ||
U. sp. | Base of the Marquechi Member.[2] | Spores.[2] |
See also
References
- ^ a b c d Javier, Grijalva Noriega, Francisco (1996). Cintura Formation--an Early Cretaceous deltaic system in northeastern Sonora, Mexico. Universidad Nacional Autónoma de México: Instituto de Geología. OCLC 814483150.
{{cite book}}
: CS1 maint: multiple names: authors list (link) - ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak al am an ao ap aq ar as at au av aw ax ay az ba bb bc bd be bf bg bh bi bj bk bl bm bn bo bp Villanueva-Amadoz, Uxue; Calvillo-Canadell, Laura; Cevallos-Ferriz, Sergio R. S.; Beraldi-Campesi, Hugo (2014). "Preliminary palaeobotanical notes on the Early Cretaceous Cintura Formation (Sonora, Mexico)". Historical Biology. 27 (3–4): 405. doi:10.1080/08912963.2014.915821. ISSN 0891-2963. S2CID 128809573.
- ^ a b Rubalcava-Knoth, Marco A.; Cevallos-Ferriz, Sergio R. S. (2022-09-01). "Lauraceous palmately lobed leaf from the middle Cretaceous Cintura Formation (Albian–Cenomanian), Sonora, Mexico: identification based on two comparative models". Cretaceous Research. 140: 105355. doi:10.1016/j.cretres.2022.105355. ISSN 0195-6671. S2CID 252028160.
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.
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