Tecomazuchil Formation

Tecomazuchil Formation
Stratigraphic range: Callovian PreꞒ Ꞓ O S D C P T J K Pg N ↓
Type	Geological Formation
Underlies	Chimeco Limestone
Overlies	Acatlán Complex
Lithology
Primary	Silty Sandstone[1]
Location
Region	Puebla Province
Country	Mexico
Type section
Named by	Rafael Pérez-Ibarguengoitia Antonio Hokuto-Castillo Alencaster de Cserna

The Tecomazuchil Formation is a geologic formation in Oaxaca, Mexico. It is made up of "a basal conglomerate 135 m thick and predominantly composed of quartz and metamorphic rock fragments, overlain by about 600 m of interbedded tan to red conglomerates, sandstones, and siltstones. The Tecomazuchil Formation overlies unconformably the Acatlán Complex and has been assigned a Middle Jurassic age, though it could represent at least part of the Oxfordian."[2] Fossil Bennettitales have been found in the formation.[3]

See also

• List of fossiliferous stratigraphic units in Mexico

References

1. "3 Ayuquililla (Jurassic of Mexico)". FossilWorks. Retrieved 17 December 2021.
2. Westermann, Gerd E. G. (1992). The Jurassic of the Circum-Pacific. Cambridge University Press. p. 100. ISBN 0521019923. Retrieved 5 April 2017.
3. Lozano-Carmona, Diego E.; Corro-Ortiz, Marcos Germán; Morales, René Luis; Velasco-De León, María Patricia (2021-06-01). "Weltrichia xochitetlii sp. nov. (Bennettitales) from the Middle Jurassic of northwestern oaxaca, Mexico: First paleobotanical evidence from the Tecomazúchil Formation". Journal of South American Earth Sciences. 108: 103230. doi:10.1016/j.jsames.2021.103230. ISSN 0895-9811. S2CID 234085434.

External links

• "Fossilworks: Gateway to the Paleobiology Database"
• "Mesozoic Sedimentary and Tectonic History of North-central Mexico", Issue 340
• Paleomagnetic study of Jurassic and Cretaceous rocks from the Mixteca terrane (Mexico)
• A new species of Weltrichia (Bennettitales) from the Middle Jurassic of the Tecomazuchil Formation (Oaxaca, Mexico)
• Magnetostratigraphy of a Middle Jurassic red bed sequence from southern Mexico