ammonites
Herrera de la base, La Gallinita (Triassic of Argentina)

Where: San Juan, Argentina (30.1° S, 67.9° W: paleocoordinates 46.8° S, 33.4° W)

• small collection-level geographic resolution

When: Cancha de Bochas Member (Ischigualasto Formation), Carnian (235.0 - 221.5 Ma)

• 40 m above base of formation, at approx. same level as ash dated to 231.4 Ma

• bed-level stratigraphic resolution

Environment/lithology: "channel"; fine-grained, hematitic, gray, green sandstone

• well-drained floodplain with high-sinuosity channels
• "grey-green, fine-grained sandstone"; bones are reddish brown and covered with a hematite crust

Size class: macrofossils

Collected in 1994

Collection methods: surface (in situ), mechanical,

Primary reference: O. A. Alcober and R. N. Martínez. 2010. A new herrerasaurid (Dinosauria, Saurischia) from the Upper Triassic Ischigualasto Formation of northwestern Argentina. Zookeys 63:55-81 [M. Carrano/M. Carrano] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 98905: authorized by Matt Carrano, entered by Matt Carrano on 22.10.2010