MH29 - Agua de La Mula: Early/Lower Hauterivian, Argentina
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Ammonitida
- Desmoceratidae
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Weavericeras vacaense
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| synonym of Valdedorsella | |||||||
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Cephalopoda
- Ammonitida
- Neocomitidae
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Hoplitocrioceras gentilii
Giovine 1950
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Bivalvia
- Trigoniida
- Myophorellidae
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Steinmanella transitoria
Steinmann 1881
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Bivalvia
- Ostreida
- Gryphaeidae
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Aetostreon sp.
Bayle 1878
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| spelled with current rank as Exogyra (Aetostreon) | |||||||
| see common names | |||||||
Geography
| Country: | Argentina | State/province: | Neuquen |
| Coordinates: | 38.2° South, 70.1° West (view map) | ||
| Paleocoordinates: | 37.7° South, 34.0° West | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Early/Lower Cretaceous |
| Stage: | Hauterivian | 10 m.y. bin: | Cretaceous 2 |
| Key time interval: | Early/Lower Hauterivian | Ammonoid zone: | Weavericeras vacaense |
| Age range of interval: | 132.60000 - 125.77000 m.y. ago |
Stratigraphy
| Formation: | Agrio | Member: | Lower | ||
| Local section: | Agua de La Mula | Local bed: | 58 m | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: From unit MH29 (0.9 m thick). From Weavericeras vacaense zone, Lower Agrio Member, Agrio Formation, early Hauterivian. KEY TO BED NUMBERING: Stratigraphic heights not given on stratigraphic column in Figure 2, but were calculated based on the scale given in same figure. Base of section corresponds to 0 m. | |||||
Lithology and environment
| Primary lithology: | shelly/skeletal poorly lithified siltstone |
| Includes fossils? | Y |
| Lithology description: Massive coquinal siltstone | |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | good |
Collection methods and comments
| Collection methods: | selective quarrying,field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Collection method comments: Material described in this paper are stored in the palaeontological collections of the University of Buenos Aires (CPBA), the Natural Sciences Museum of La Plata (MLP), and the Geological Survey, Buenos Aires (SGN). | |
| Taxonomic list comments:List doesn't appear to be exhaustive for each horizon. Ammonite nomenclature should be solid given paper is a taxonomic revision of Hoplitocerioceras. | |
Metadata
| Database number: | 50555 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | M. Clapham | Research group: | marine invertebrate |
| Created: | 2005-05-17 18:54:42 | Last modified: | 2017-05-23 16:34:15 |
| Access level: | the public | Released: | 2005-05-17 18:54:42 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 13543. | M. B. Aguirre-Urreta and P. F. Rawson. 2001. Lower Cretaceous ammonites from the Neuquen Basin, Argentina: the Hauterivian neocomitid genus Hoplitocrioceras (Giovine, 1950). Cretaceous Research 22:201-218 [A. Miller/A. Hendy/M. Clapham] |