Cerro de La Parva, Neuquen Basin (Leanza collection): Late/Upper Valanginian, Argentina
collected by Leanza
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Ammonitida
- Neocomitidae
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Leopoldia lycoris n. sp.
Leanza and Giovine 1949
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| recombined as Karakaschiceras lycoris | |||||||
| see common names | |||||||
Geography
| Country: | Argentina |
| Coordinates: | 37.3° South, 70.5° West (view map) |
| Paleocoordinates: | 36.4° South, 33.6° West |
| Basis of coordinate: | estimated from map |
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Early/Lower Cretaceous |
| Stage: | Valanginian | 10 m.y. bin: | Cretaceous 1 |
| Key time interval: | Late/Upper Valanginian | ||
| Age range of interval: | 139.80000 - 132.60000 m.y. ago |
Stratigraphy
Lithology and environment
| Primary lithology: | lithified calcareous "shale" |
| Lithology description: gray shales, level with yellowish calcareous nodules | |
| Environment: | transition zone/lower shoreface |
| Glacial or sequence phase: | transgressive |
| Geology comments: ' A transgressive phase started in mid-Valanginian time with the deposition of black shales and limestones of the Argio Fm.'
'shoreface to offshore paleoenvironments on a storm-dominated, shallow marine ramp' (see PBDB coll. 50185) | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
| Collectors: | Leanza |
| Collection method comments: Repository: Catedra de Paleontologia, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (CPBA) | |
Metadata
| Database number: | 171725 | ||
| Authorizer: | M. Clapham | Enterer: | M. Clapham |
| Modifier: | M. Clapham | Research group: | marine invertebrate |
| Created: | 2015-07-17 16:25:32 | Last modified: | 2016-05-01 21:31:39 |
| Access level: | the public | Released: | 2015-07-17 16:25:32 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 18861. | M. B. Aguirre-Urreta. 1998. The ammonites Karakaschiceras and Neohoploceras (Valanginian Neocomitidae) from the Neuquen Basin, West-Central Argentina. Journal of Paleontology 72:39-59 [M. Aberhan/S. Nurnberg] |