KT section Opaso, Neuquén Basin, OP23: 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
Anthozoa - Scleractinia - Flabellidae
Flabellum sp. Lesson 1831
1 individual
Bivalvia - Nuculida
Nuculoida indet. Dall 1889
1 individual
corrected as Nuculida
Bivalvia - Ostreida - Gryphaeidae
Pycnodonte (Phygraea) burckhardti (Bohm 1903)
3 individuals
[entered as Pycnodonte (Phygrea) burckhardti]
Bivalvia - Arcida - Parallelodontidae
Nemodon sulcatinus (Evans and Shumard 1857)
1 individual
recombined as Grammatodon (Cosmetodon) sulcatinus
Bivalvia - Carditida - Carditidae
Venericardia iheringi
2 individuals
Bivalvia - Lucinida - Lucinidae
Pteromyrtea sp. Finlay 1926
1 individual
see common names

Geography
Country:Argentina State/province:Neuquén
Coordinates: 38.1° South, 68.4° West (view map)
Paleocoordinates:40.6° South, 56.8° West
Basis of coordinate:unpublished field data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:66.00000 - 61.60000 m.y. ago
Stratigraphy
Geological group:Malargüe Formation:Jagüel
Local section:Opaso Local bed:2.25 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 0.5 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 spines were found but not reported
Metadata
Database number:73888
Authorizer:W. Kiessling Enterer:S. Weidemeyer
Modifier:S. Weidemeyer Research group:marine invertebrate
Created:2007-07-11 11:15:47 Last modified:2017-05-23 16:34:15
Access level:authorizer only Released:2009-07-11 11:15:47
Creative Commons license:CC BY
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]