Earth:La Chilca Formation
From HandWiki
La Chilca Formation (Spanish: Formación La Chilca) is a geological formation that crops out in the Precordillera of San Juan Province, Argentina. Rocks of the formation are mostly shale and sandstone that deposited during the Ordovician and Silurian periods.[1] The formation contains a high diversity of graptolite fossils.[1][2] Graptolite fossil taxa found include:[1]
- Monograptus priodon
- Stimulograptus
- Pseudoplegmatograptus reticulatus
- Stimulograptus sedgwickii
- Talacastograptus leanzai
- Retiolites geinitzianus
- Coronograptus
- Metaclimacograptus asejradi
- Pristiograptus Pristiograptus
References
- ↑ 1.0 1.1 1.2 Lopez, Fernando Enrique; Kaufmann, Cintia (2023). "New insights on the Silurian graptolite biostratigraphy of the La Chilca Formation, Poblete Norte section, Central Precordillera of San Juan, Argentina: faunal replacement and paleoenvironmental implications". Andean Geology 50 (2). doi:10.5027/andgeov50n2-3617. https://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062023000200201&lng=en&nrm=iso&tlng=en.
- ↑ Serra, F.; Feltes, N.A.; Mango, M.J.; Henderson, M.A.; Albanesi, G.L.; Ortega, G.D.C. (2020). "Darriwilian (Middle ordovician) conodonts and graptolites from the cerro la chilca section, central precordillera, Argentina". Andean Geology 47 (1): 125-143. doi:10.5027/andgeoV47n1-3229.
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