KT section Opaso, Neuquén Basin, OP27: Danian, Argentina
collected by Aberhan, M., Kiessling, W., Weidemeyer, S. 18032004

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Echinoidea - Echinoida
Echinoida informal irr
1 individual
Polychaeta - Sabellida - Serpulidae
Serpula sp. Linnaeus 1758
7 individuals
Gastropoda
Gastropoda indet. Cuvier 1795
1 individual
Gastropoda - Opisthobranchia
cf. Priscaphander informal sp. A Finlay & Marwick 1937
1 individual
Gastropoda - Neogastropoda - Fasciolariidae
Taioma cf. tricarinata Finlay and Marwick 1937
1 individual
Cryptorhytis informal sp. A Meek 1876
1 individual
Gastropoda - Aporrhaidae
Struthioptera sp. Finlay and Marwick 1937
24 individuals
Bivalvia
Bivalvia indet. Linnaeus 1758
1 individual
Bivalvia - Nuculanida - Nuculanidae
Yoldia (Calorhadia) perdita
3 individuals
    = Spineilo perdita
Aberhan 2010
Nuculana cf. amuriensis
6 individuals
Bivalvia - Nuculida
Nuculoida indet. Dall 1889
1 individual
corrected as Nuculida
Bivalvia - Pectinida - Pectinidae
Camptonectes (Camptonectes) sp. Meek 1864
30 individuals
Bivalvia - Ostreida - Gryphaeidae
Pycnodonte (Phygraea) burckhardti (Bohm 1903)
1 individual
[entered as Pycnodonte (Phygrea) burckhardti]
Bivalvia - Arcida - Parallelodontidae
Nemodon sulcatinus (Evans and Shumard 1857)
10 individuals
recombined as Grammatodon (Cosmetodon) sulcatinus
Bivalvia - Lucinida - Lucinidae
Pteromyrtea sp. Finlay 1926
4 individuals
Anthozoa - Scleractinia - Flabellidae
Flabellum sp. Lesson 1831
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Basis of coordinate:unpublished field data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:19.70 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 0.80 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., Weidemeyer, S. Collection dates:18.03.2004
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:73926
Authorizer:W. Kiessling, M. Aberhan Enterer:S. Weidemeyer, S. Nurnberg
Modifier:S. Weidemeyer Research group:marine invertebrate
Created:2007-07-12 12:57:19 Last modified:2017-05-23 16:34:15
Access level:authorizer only Released:2009-07-12 12:57:19
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]

Secondary references:

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