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• coordinate based on unpublished field data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 2.50 m. Data from bed/horizon refers to midpoint of sampled beds.
• group of beds-level stratigraphic resolution
Environment/lithology: transition zone or lower shoreface; sandstone
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 unpublished Ph.D. thesis.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 74112: authorized by Wolfgang Kiessling, entered by Sven Weidemeyer on 23.07.2007
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
Aphrodina (Tikia) cf. thomsoni venus clam | |
Pacitrigonia patagonica Feruglio 1937 clam | |
Grammatodontinae "sp. A" Branson 1942 clam |