Boletín de la Sociedad Geológica Mexicana Volumen 76, núm. 1, A300124, 2024 http://dx.doi.org/10.18268/BSGM2024v76n1a300124

Nota corta

Calpionélidos en una sucesión vulcano-sedimentaria en Guanaceví, Durango, occidente de México

Calpionellids in a volcano-sedimentary succession in Guanaceví, Durango, western Mexico

Samuel Eguiluz y de Antuñano^1,*, Rafael López-Martínez²

¹ Consultor, Rinconada Precolombina, Bonampak 103, CDMX.

² Laboratorio de Carbonatos y Procesos Kársticos, Universidad Nacional Autónoma de México. Ciudad Universitaria, 04510 Coyoacán, CDMX, México.

* Autor para correspondencia: (S. Eguiluz y de Antuñano) This email address is being protected from spambots. You need JavaScript enabled to view it.

Cómo citar este artículo:

Eguiluz y de Antuñano, S., López-Martínez R., 2024, Calpionélidos en una sucesión vulcano-sedimentaria en Guanaceví, Durango, occidente de México: Boletín de la Sociedad Geológica Mexicana, 76 (1), A300124. http://dx.doi.org/10.18268/BSGM2024v76n1a300124

Manuscrito recibido: 7 de Julio de 2023; Manuscrito corregido: 20 de Diciembre de 2023; Manuscrito aceptado: 24 de Enero de 2024.

ABSTRACT

In Guanaceví, Durango, previous works describe a volcano-sedimentary succession referred to as the Lower Volcanic Complex. In this succession, Calpionella alpina, Calpionella elliptica and Tintinnopsella carpathica were reported in limestone strata considered to be from the Middle Berriasian. The locality of this find is imprecise, and no taxonomic evidence of the microfossils was provided to verify their presence in rocks of this age in western Mexico. The objective of this work is to offer taxonomic evidence of the fossiliferous assemblage composed of Chitinoidella sp., Crassicollaria sp., Crassicollaria massutinianna, Remaniella sp., and Tintinnopsella carpathica, from the late Tithonian to the early Berriasian, likewise, the precise location of the fossiliferous localities is given. The presence of the fossiliferous assemblage treated here, together with previous reports on the relatively close existence of Crassicollaria massutinianna, extends the distribution of calpionellids, from a Tethyan environment to the Boreal Pacific realm in western Mexico.

The stratigraphic succession in which the fossils are found is formed, at the base, by polymictic and immature conglomerate, which gradually passes into sandstone, shale, and limestone, with tuff and andesite spills interspersed. The characteristics of these lithologies possibly represent a transgression, from continental facies to marginal coastal and deep marine facies, with volcanism.

Keywords: Chitinoidella, Crassicollaria, Remaniella, Tintinnopsella carpathica, transgresión, Tithonian-Berriasiano, Pacific realm.