Algarrobo (EQM): Early/Lower Maastrichtian, Chile
collected 2006
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
- Plesiosauria
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Plesiosauria indet.
(de Blainville 1835)
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1 specimen | |||||||||
| SGO.PV.6638 (incomplete left propodial) | ||||||||||
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Reptilia
- Plesiosauria
- Elasmosauridae
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Elasmosauridae indet.
Cope 1869
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2 specimens | |||||||||
| SGO.PV.90 (21 articulated vertebrae) and SGO.PV.6572 (17 isolated teeth) | ||||||||||
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Reptilia
- Mosasauridae
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Mosasauridae indet.
Gervais 1852
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2 specimens | |||||||||
| SGO.PV.6570 (one isolated tooth) and SGO.PV.6571 (three isolated crowns) | ||||||||||
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Reptilia
- Testudines
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Testudines indet.
Batsch 1788
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2 specimens | |||||||||
| MPC.11003 (neural plate) and MPC.11002 (peripheral plate) | ||||||||||
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Chelonioidea indet.
(Baur 1893)
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1 specimen | |||||||||
| MPC.11001 (proximal portion of left humerus) | ||||||||||
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Reptilia
- Testudines
- Dermochelyidae
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cf. Dermochelyidae indet.
Lydekker 1889
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1 individual | |||||||||
| SGO.PV.6573 (associated remains including incomplete left scapula, right ilium and right pubis) | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Chile | State/province: | Santiago |
| Coordinates: | 33.4° South, 71.7° West (view map) | ||
| Paleocoordinates: | 35.5° South, 59.2° West | ||
| Basis of coordinate: | stated in text |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Maastrichtian | 10 m.y. bin: | Cretaceous 8 |
| Key time interval: | Early/Lower Maastrichtian | ||
| Age range of interval: | 72.10000 - 66.00000 m.y. ago |
Stratigraphy
| Formation: | Estratos de Quebrada Municipalidad | ||||
| Stratigraphy comments: The EQM is considered to be Maastrichtian in age based on bivalves such as C. acuticostatum and P. hanetiana (Pérez-D’Angelo and Reyes, 1978). Recently this determination has been constrained by a radiometric date on 90Sr/89Sr obtained from bivalve shells (Suárez and Marquardt, 2003) that indicated an age of 69 +- 01 Ma (early Maastrichtian). |
Lithology and environment
| Primary lithology: | fine sandstone |
| Secondary lithology: | conglomerate |
| Includes fossils? | Y |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis | Collection dates: | Since 2006 |
Metadata
| Also known as: | Marine reptile site | ||
| Database number: | 132352 | ||
| Authorizer: | P. Mannion | Enterer: | P. Mannion | Research group: | vertebrate |
| Created: | 2012-08-14 20:21:14 | Last modified: | 2012-08-14 05:21:14 |
| Access level: | the public | Released: | 2012-08-14 20:21:14 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 42627. | R. A. Otero, J. F. Parham, S. Soto-Acuña, P. Jimenez-Huidobro, and D. Rubilar-Rogers. 2012. Marine reptiles from Late Cretaceous (early Maastrichtian) deposits in Algarrobo, central Chile. Cretaceous Research 35:124-132 [P. Mannion/P. Mannion/F. Aspromonte] |