Where: Chubut, Argentina (42.7° S, 70.0° W: paleocoordinates 45.1° S, 58.9° W)
• coordinate based on unpublished field data
• small collection-level geographic resolution
When: Lefipán Formation, Danian (66.0 - 61.6 Ma)
• K/T boundary (basis of SM30) is at 0 m. Beds lumped over 0.30 m. Data from bed/horizon refers to midpoint of sampled beds.
• group of beds-level stratigraphic resolution
Environment/lithology: transition zone or lower shoreface; brown 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 unpublished Ph.D. thesis.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 74131: authorized by Wolfgang Kiessling, entered by Sven Weidemeyer on 24.07.2007
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
Turritella malaspina turret shell | |
Bivalvia | |
Bivalvia indet. Linnaeus 1758 clam | |
Modiolus "sp. B" Lamarck 1801 mussel | |
Heterodonta "P" Neumayr 1884 clam | |
Meretrix chalcedonica venus clam | |
Tancrediidae "sp. A" Meek 1864 clam | |
Astarte venatorum clam |