EL ASHGILLIANO TARDIO (IDRNANTIANO) DEL CERRO LA CHILCA, PRECORDILLERADE SAN JUAN, ARGENTINA
AbstractAshgillian (Himantian) shelly fauna from the Cerro La Chilca section is reported for the first time. It is composed by the brachiopods Paromalomena polonica, Drabovia undulata n. sp. and Plectothyrclla crassicosta, among other well known genera. The strata, which contain this fauna belong to the Don Braulio Formation that is intercalated between the GuaIcamayo (Caradoc) and the La Chilca (Llandovery) formations. The fossiliferous beds are correlated with other Himantian sequences from the Precordillera basin. The environmental and paleoclimatic importance of this shallow marine fauna is constrained. The basal unconformity of the Ashgillian beds is interpreted as a first order sequence boundary related to glacio-eustatic lowering
How to Cite
Authors publishing in Ameghiniana have the option of making their article freely available online. Authors opting for the Open Access must pay a fee of $300 (US dollars) to cover article-processing costs and to ensure the article is made open access. Please contact the Production Team after the acceptance of your manuscript if you are interested in making your article Open Access. This option implies by default a license Creative Commons Attribution Non-Commercial-NoDerivs License (CC BY NC ND). If your funding institution requires a different licensing option please communicate this to the Production Team after the acceptance of your manusctipt.