Brachiopods of the Punta Negra Formation, Rio de las Chacritas section30 (Devonian of Argentina)

Where: Argentina (30.5° S, 68.5° W: paleocoordinates 62.7° S, 113.8° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Punta Negra Formation, Late/Upper Emsian (402.5 - 391.9 Ma)

• "In spite of the provisional identification of most of this scarce material, it allows us to substantiate an Early Devonian age (probably latest Emsian) for the lower part of the Punta Negra Formation." Collection is from 250 m above base of formation.

• formation-level stratigraphic resolution

Environment/lithology: marine; bioturbated, gray, green sandstone and shale

• Precordillera. Paleoenvironment interpreted as "thick siliciclastic deltaic unit."
• green-gray sandstones (collection level). Section (figure 2) shows dominant sandstones, also shales and conglomerates, with planar lamination, hummocky cross beds, bioturbation, traces, plant remains and other features.

Primary reference: Z. A. Herrera and U. D. Bustos. 2001. Braquiopodos devonicos de la Formacion Punta Negra, en el perfil del rio de Las Chacritas, Precordillera argentina. Ameghiniana 38(4):367-374 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 25556: authorized by Michael Foote, entered by Michael Foote on 17.09.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Dagmachonetinae indet.
Lingulata
 Lingulida - Discinidae
Discinidae indet.
Rhynchonellata
 Terebratulida - Meganterididae
Mutationella sp.
 Orthida - Draboviidae
Salopina sp.
Salopina sp. Boucot 1960
 Spiriferida - Ambocoeliidae
? Metaplasia sp.