ammonites
Bajo de Santa Rosa locality (MACN) (Cretaceous to of Argentina)

Also known as Salitral de Santa Rosa, El Matuasto, "Cerro Bonparte"

Where: Río Negro, Argentina (40.1° S, 66.8° W: paleocoordinates 42.9° S, 52.5° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Lower Member (Allen Formation), Campanian to Campanian (83.5 - 65.5 Ma)

• lower member of formation; eggs from 4 levels

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial; poorly lithified, fine-grained, yellow sandstone and mudstone

• "a fluvial environment in the basal section"
• "alternated sandstones and mudstones with small lents of conglomerates." "The fossil-bearing bed consists of friable, yellowish, fine-grained clean sandstone enclosed between siltstone layers."

Size classes: macrofossils, mesofossils

Collected in 1990-1994; reposited in the MACN

Collection methods: quarrying, surface (float), surface (in situ), mechanical,

Primary reference: A. Martinelli and A. M. Forasiepi. 2004. Late Cretaceous vertebrates from Bajo de Santa Rosa (Allen Formation), Río Negro province, Argentina, with the description of a new sauropod dinosaur (Titanosauridae). Revista del Museo Argentino de Ciencias Naturales, nuevo serie 6(2):257-305 [M. Carrano/M. Carrano/M. Carrano] more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 49557: authorized by Matt Carrano, entered by Matt Carrano on 19.04.2005, edited by Marc Jones

Creative Commons license: CC BY (attribution)