Otlaltepec Formation

Otlaltepec Formation
Stratigraphic range: Middle Jurassic,
Bathonian–Callovian

PreꞒ

Ꞓ

O

S

D

C

P

T

J

K

Pg

N

↓
Otlaltepec Formation; Stratigraphic range: Middle Jurassic, ; Bathonian–Callovian PreꞒ Ꞓ O S D C P T J K Pg N ↓
Type	Geological formation
Overlies	Piedra Hueca Formation
Thickness	Typically at least 50 m (160 ft)
Lithology
Primary	Sandstone
Location
Coordinates	18.4019°N 97.9086°W
Country	Mexico
Extent	Otlaltepec Basin
Type section
Named for	Otlaltepec Basin

The Otlaltepec Formation is a Middle Jurassic (Bathonian Callovian) geologic formation located in Mexico. The unit is derived from rocks of Late Carboniferous or Early Permian age due to the presence of microscopic zircon crystals dating to around 312-280 Ma found in sandstone deposited within the formation, although the fossil content preserved in the formation dates it to the Middle Jurassic (Bathonian-Callovian).[1] It overlies the Piedra Hueca Formation, which dates to no later than the Sinemurian (Early Jurassic).[1]

Dinosaur remains pertaining to an indeterminate member of the Flagellicaudata, representing the first conclusive evidence of the occurrence of Flagellicaudata in this part of North America, are known from this formation.[2]

References

Martini, Michelangelo; Ramírez-Calderón, Monica; Solari, Luigi; Villanueva-Amadoz, Uxue; Zepeda-Martínez, Mildred; Ortega-Gutiérrez, Fernando; Elías-Herrera, Mariano (2016). "Provenance analysis of Jurassic sandstones from the Otlaltepec Basin, southern Mexico: Implications for the reconstruction of Pangea breakup". Geosphere. 12 (6): 1842–1864. doi:10.1130/GES01366.1. ISSN 1553-040X.
Héctor E. Rivera-Sylva; Luis Espinosa-Arrubarrena (2020). "Remains of a diplodocid (Sauropoda: Flagellicaudata) from the Otlaltepec Formation Middle Jurassic (Bathonian-Callovian) from Puebla, Mexico". Paleontología Mexicana. 9 (2): 145–150.

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.

[Luigi-1] Martini, Michelangelo; Ramírez-Calderón, Monica; Solari, Luigi; Villanueva-Amadoz, Uxue; Zepeda-Martínez, Mildred; Ortega-Gutiérrez, Fernando; Elías-Herrera, Mariano (2016). "Provenance analysis of Jurassic sandstones from the Otlaltepec Basin, southern Mexico: Implications for the reconstruction of Pangea breakup". Geosphere. 12 (6): 1842–1864. doi:10.1130/GES01366.1. ISSN 1553-040X.

[2] Héctor E. Rivera-Sylva; Luis Espinosa-Arrubarrena (2020). "Remains of a diplodocid (Sauropoda: Flagellicaudata) from the Otlaltepec Formation Middle Jurassic (Bathonian-Callovian) from Puebla, Mexico". Paleontología Mexicana. 9 (2): 145–150.