Where: Chubut, Argentina (42.7° S, 70.0° W: paleocoordinates 44.8° S, 58.4° W)

• coordinate based on unpublished field data

• small collection-level geographic resolution

When: Lefipán Formation, Maastrichtian (72.1 - 66.0 Ma)

• K/T boundary (basis of SM30) is at 0 m. Beds lumped over 0.40 m. Data from bed/horizon refers to midpoint of sampled beds.

• group of beds-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; carbonate

Size classes: macrofossils, mesofossils

Preservation: cast, mold/impression, original calcite, replaced with calcite

Collected by Aberhan, M., Kiessling, W., Scholz, H., Medina, F. A. in 2003

Collection methods: bulk, mechanical,

Primary reference: S. Weidemeyer. 2007. Molluscs at the K/Pg boundary in Argentina: Extinction and recovery patterns. unpublished Ph.D. thesis. [W. Kiessling/S. Weidemeyer]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 74122: authorized by Wolfgang Kiessling, entered by Sven Weidemeyer on 23.07.2007

Creative Commons license: CC BY (attribution)