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• coordinate based on unpublished field data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 0.50 m. Data from bed/horizon refers to midpoint of sampled beds.
• group of beds-level stratigraphic resolution
Environment/lithology: transition zone or lower shoreface; mudstone
Size classes: macrofossils, mesofossils
Preservation: cast, mold/impression, original calcite, replaced with calcite
Collected by Aberhan, M., Kiessling, W., Weidemeyer, S. in 2004
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 unpublished Ph.D. thesis.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 74092: authorized by Wolfgang Kiessling, entered by Sven Weidemeyer on 21.07.2007
Creative Commons license: CC BY (attribution)
Taxonomic list
Echinoidea | |
Echinoida "irr" Troschel 1872 sea urchin | |
Gastropoda | |
Gastropoda indet. Cuvier 1795 snail | |
Turritella malaspina turret shell | |
Euspira cf. pueyrredonensis moon snail | |
Bivalvia | |
Bivalvia indet. Linnaeus 1758 clam | |
Nuculanidae indet. Adams and Adams 1858 pointed nut clam | |
Australoneilo gracilis Wilckens 1905 clam | |
Nucula sp. Lamarck 1799 nut clam | |
Panopea sp. Menard 1807 clam | |
Aphrodina (Tikia) cf. thomsoni venus clam | |
Pseudolimea "symmetrica" Douglas and Arkell 1932 file clam |