KT section Paso del Sapo, Canadón Asfalto Basin, SM7: Maastrichtian, Argentina
collected by Aberhan, M., Kiessling, W., Scholz, H., Medina, F. A. 30032003
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
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Gastropoda indet.
Cuvier 1795
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3 individuals | ||||||
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Gastropoda
- Heterostropha
- Acteonidae
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Acteon australis
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1 individual | ||||||
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Gastropoda
- Turritellidae
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Turritellidae indet.
Lovén 1847
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24 individuals | ||||||
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Turritella malaspina
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3 individuals | ||||||
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Gastropoda
- Naticidae
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Euspira cf. pueyrredonensis
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2 individuals | ||||||
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Gastropoda
- Neogastropoda
- Fasciolariidae
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Fusininae informal sp. A
Swainson 1840
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2 individuals | ||||||
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Gastropoda
- Neogastropoda
- Turridae
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cf. Parasyrinx sp.
Finlay 1924
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1 individual | ||||||
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Gastropoda
- Aporrhaidae
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Struthioptera cf. haastiana
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35 individuals | ||||||
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Bivalvia
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Bivalvia indet.
Linnaeus 1758
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2 individuals | ||||||
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Bivalvia
- Mytilida
- Mytilidae
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Modiolus informal sp. B
(Lamarck 1801)
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1 individual | ||||||
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Bivalvia
- Arcida
- Parallelodontidae
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Grammatodontinae informal sp. A
Branson 1942
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1 individual | ||||||
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Bivalvia
- Arcida
- Cucullaeidae
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Cucullaea cf. antarctica
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2 individuals | ||||||
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Bivalvia
- Cardiida
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Cardioidea informal sp. A
(Lamarck 1809)
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1 individual | ||||||
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Bivalvia
- Cardiida
- Tellinidae
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Solyma cf. levis
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2 individuals | ||||||
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Linearia (Linearia) cf. semicostata
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2 individuals | ||||||
| original and current combination Linearis | |||||||
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Linearia (Linearia) sp.
(Conrad 1860)
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2 individuals | ||||||
| original and current combination Linearis | |||||||
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Bivalvia
- Cardiida
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Protagelus gratus
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3 individuals | ||||||
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Bivalvia
- Cardiida
- Veneridae
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Aphrodina (Tikia) cf. thomsoni
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1 individual | ||||||
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Mesocallista aff. solitaria
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2 individuals | ||||||
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Bivalvia
- Hiatellida
- Hiatellidae
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Panopea sp.
(Menard 1807)
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2 individuals | ||||||
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Panopea cf. clausa
(Wilckens 1910)
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21 individuals | ||||||
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Bivalvia
- Pholadomyida
- Pholadomyidae
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Pholadomya sp.
Sowerby 1823
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3 individuals | ||||||
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Pachymya sp.
Sowerby 1826
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1 individual | ||||||
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Bivalvia
- Carditida
- Carditidae
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Venericardia iheringi
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5 individuals | ||||||
| see common names | |||||||
Geography
| Country: | Argentina | State/province: | Chubut |
| Coordinates: | 42.7° South, 70.0° West (view map) | ||
| Paleocoordinates: | 44.8° South, 58.4° West | ||
| Basis of coordinate: | unpublished field data | ||
| Geographic resolution: | small collection |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Maastrichtian | 10 m.y. bin: | Cretaceous 8 |
| Key time interval: | Maastrichtian | ||
| Age range of interval: | 72.10000 - 66.00000 m.y. ago |
Stratigraphy
| Formation: | Lefipán | ||||
| Local section: | Estancia San Martin | Local bed: | -61.10 m | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: K/T boundary (basis of SM30) is at 0 m. Beds lumped over 4.30 m. Data from bed/horizon refers to midpoint of sampled beds. | |||||
Lithology and environment
| Primary lithology: | mudstone | ||
| Includes fossils? | Y | ||
| Environment: | transition zone/lower shoreface | Tectonic setting: | foreland basin |
| Geology comments: inner shelf environment. | |||
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: | some macrofossils | ||
| 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: | 30.03.2003 |
| Taxonomic list comments:Baculites and Crustacea fragments were reported but not included. | |||
Metadata
| Database number: | 74108 | ||
| Authorizer: | W. Kiessling | Enterer: | S. Weidemeyer |
| Modifier: | M. Manojlovic | Research group: | marine invertebrate |
| Created: | 2007-07-23 07:12:08 | Last modified: | 2017-05-23 16:34:15 |
| Access level: | the public | Released: | 2007-07-23 07:12:08 |
| 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] |