KT section Opaso, Neuquén Basin, OP11: Danian, Argentina
collected by Aberhan, M., Kiessling, W., Scholz, H., Medina, F. A. 27032003

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Gastropoda
1 individual
Gastropoda - Neogastropoda - Tudiclidae
1 individual
Gastropoda - Neogastropoda - Fasciolariidae
Taioma cf. tricarinata Finlay and Marwick 1937
1 individual
1 individual
Bivalvia
2 individuals
1 individual
Bivalvia - Lucinida - Lucinidae
1 individual
Pteromyrtea sp. Finlay 1926
2 individuals
Bivalvia - Carditida - Carditidae
5 individuals
Bivalvia - Carditida - Astartidae
3 individuals
Bivalvia - Arcida - Parallelodontidae
Nemodon sulcatinus (Evans and Shumard 1857)
5 individuals
Bivalvia - Ostreida - Gryphaeidae
7 individuals
[entered as Pycnodonte (Phygrea) burckhardti]
Bivalvia - Pectinida - Limidae
2 individuals
Bivalvia - Nuculanida - Nuculanidae
5 individuals
3 individuals
Aberhan 2010
Bivalvia - Nuculanida - Malletiidae
4 individuals
Sabellida - Serpulidae
2 individuals
see common names

Geography
Country:Argentina State/province:Neuquén
Coordinates: 38.1° South, 68.4° West (view map)
Paleocoordinates:39.1° South, 55.5° West (Wright 2013)
Basis of coordinate:unpublished field data
Geographic resolution:small collection
Time
Period: Paleogene Epoch: Paleocene
Stage: Danian 10 m.y. bin: Cenozoic 1
Key time interval: Danian
Age range of interval: 66 - 61.66 m.y. ago
Stratigraphy
Geological group:Malargüe Formation:Jagüel
Local section:Opaso Local bed:9.00 m
Local order:bottom to top
Stratigraphic resolution:group of beds
Stratigraphy comments: K/T boundary is at 0 m (top of boundary layer). Beds lumped over 1 m. Data from bed/horizon refers to midpoint of sampled beds.
Lithology and environment
Primary lithology:gray,green lithified calcareous mudstone
Includes fossils?Y
Environment:offshore Tectonic setting:foreland basin
Geology comments: mid to outer shelf environment, below normal wave base.
Taphonomy
Modes of preservation:body,cast,mold/impression,original calcite,replaced with calcite
Size of fossils:macrofossils,mesofossils
Preservation of anatomical detail:good
Temporal resolution:time-averaged
Spatial resolution:parautochthonous
Collection methods and comments
Collection excludes:all microfossils
Collection methods:bulk,mechanical,field collection,observed (not collected)
Reason for describing collection:paleoecologic analysis
Collectors:Aberhan, M., Kiessling, W., Scholz, H., Medina, F. A. Collection dates:27.03.2003
Collection method comments: Number of individuals was determined according to standard procedures. Bivalves: articulated valves plus larger number of right or left valves plus half of undetermined fragments.
Taxonomic list comments:Echinoid plates were found but not reported
Metadata
Database number:73912
Authorizer:W. Kiessling Enterer:S. Weidemeyer, W. Kiessling
Modifier:S. Weidemeyer Research group:marine invertebrate
Created:2007-07-12 06:53:44 Last modified:2025-02-22 15:12:02
Access level:authorizer only Released:2009-07-12 06:53:44
Creative Commons license:CC0
Reference information

Primary reference:
24819. S. Weidemeyer. 2007. Molluscs at the K/Pg boundary in Argentina: Extinction and recovery patterns. unpublished Ph.D. thesis. [W. Kiessling/S. Weidemeyer]

Secondary references:

34080 M. Aberhan. 2010. Cretaceous bivalves: taxonomic opinions. [W. Kiessling/W. Kiessling]