Barrel Springs arroyo (UNM V-143): Late/Upper Maastrichtian, New Mexico
collected by C. Gilmore, J. Reeside, C. H. Sternberg 1916, 1921-1922
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
- Theropoda
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Theropoda indet.
Marsh 1881
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Gilmore 1922 | |||||||||
| teeth; incl. back of skull & pelvis, Sternberg's #50, 51 | ||||||||||
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Reptilia
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Ankylosauria indet.
Osborn 1923
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Gilmore 1922 | |||||||||
| "dermal plates of an armored form" | ||||||||||
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Ceratopsia indet.
Marsh 1890
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Gilmore 1922 | |||||||||
| teeth | ||||||||||
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Reptilia
- Saltasauridae
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Sauropoda indet.
Marsh 1878
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8 specimens | |||||||||
| USNM 10486, 10487; UNM FKK-029 (=NMMNH P-29725), NMMNH P-29726 (1 measurement) | ||||||||||
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= Alamosaurus sanjuanensis n. gen., n. sp.
Gilmore 1922
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Gilmore 1922 | |||||||||
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Reptilia
- Crocodylia
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Crocodylia indet.
(Owen 1842)
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Gilmore 1922 | |||||||||
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Reptilia
- Testudines
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Testudines indet.
Batsch 1788
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Gilmore 1922 | 2 specimens | ||||||||
| incl. Sternberg's #49 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | New Mexico | County: | San Juan |
| Coordinates: | 36.3° North, 108.0° West (view map) | ||||
| Paleocoordinates: | 43.6° North, 85.7° West | ||||
| Basis of coordinate: | stated in text | ||||
| Altitude: | 1920 meters | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Maastrichtian | 10 m.y. bin: | Cretaceous 8 |
| Key time interval: | Late/Upper Maastrichtian | ||
| Age range of interval: | 72.10000 - 66.00000 m.y. ago |
Stratigraphy
| Formation: | Ojo Alamo | Member: | Naashoibito | ||
| Local section: | Barrl | Local bed: | 1 | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: from lower part of layer at this site
Flynn et al. 2020: The mammalian faunas of the Naashoibito Member correlates to the Lancian Land Mammal Age, which suggests a late Maastrichtian age (Williamson and Weil, 2008a). Paleobotanical analyses on the megaflora and pollen indicates that the Ojo Alamo Sandstone is earliest Paleocene in age and is correlated with palynostratigraphic zones P1 or P2 ( Anderson, 1959; Nichols, 2003; Williamson et al., 2008; Flynn and Peppe, in press). Recent detrital sanidine and paleomagnetic work has constrained the Naashoibito Member to the latest Maastrichtian indicating the K/Pg boundary is represented by the unconformity between the Naashoibito Member and the Ojo Alamo Sandstone (Peppe et al., 2013; Flynn et al., 2019). These data, coupled with previous sedimentological analyses, demonstrate that the Naashoibito Member is late Maastrichtian in age and the Ojo Alamo Sandstone is early Paleocene in age with an erosive unconformity, that cuts out the Cretaceous-Paleogene boundary, separating the two units | |||||
Lithology and environment
| Primary lithology: | concretionary,brown,white conglomeratic sandstone |
| Includes fossils? | Y |
| Lithology description: "Sandstone, soft white, conglomeratic; contains brown concretions" | |
| Environment: | "channel" |
Taphonomy
| Modes of preservation: | body |
| Degree of concentration: | dispersed |
| Size of fossils: | macrofossils,mesofossils |
| Preservation of anatomical detail: | medium |
| Associated major elements: | some |
| Disassociated major elements: | some |
| Disassociated minor elements: | some |
| Fragmentation: | frequent |
| Temporal resolution: | snapshot |
| Spatial resolution: | parautochthonous |
Collection methods and comments
| Collection methods: | selective quarrying,surface (float),surface (in situ),mechanical,field collection | ||
| Reason for describing collection: | biostratigraphic analysis | ||
| Museum repositories: | USNM | ||
| Collectors: | C. Gilmore, J. Reeside, C. H. Sternberg | Collection dates: | 1916, 1921-1922 |
| Collection method comments: original collection by Gilmore in 1916, followed by main collecting by J. B. Reeside, Jr., June 1921 and additional specimens collected by C. H. Sternberg in 1922; specimens found about 200 ft apart and may represent one individual | |||
Metadata
| Also known as: | Alamosaurus type site, Bauer 67, NMMNH Loc. L-4225 | ||
| Database number: | 46992 | ||
| Authorizer: | M. Carrano | Enterer: | M. Carrano |
| Modifier: | G. Varnham | Research group: | vertebrate |
| Created: | 2005-01-28 14:40:47 | Last modified: | 2022-02-08 07:28:06 |
| Access level: | the public | Released: | 2005-01-28 14:40:47 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 14568. | ETE | C. W. Gilmore. 1921. Discovery of sauropod dinosaur remains in the Upper Cretaceous of New Mexico. Science 54(1395):274 [M. Carrano/M. Carrano/M. Carrano] |
Secondary references:
| 14569 | ETE | C. W. Gilmore. 1922. A new sauropod dinosaur from the Ojo Alamo Formation of New Mexico. Smithsonian Miscellaneous Collections 72(34):1-9 [M. Carrano/M. Carrano/M. Carrano] |
| 63054 | C. W. Gilmore. 1939. A review of recent progress in reptilian paleontology. Bulletin of the Geological Society of America 50:337-348 [M. Carrano/M. Carrano] | |
| 66250 | S. E. Jasinski, R. M. Sullivan, and S. G. Lucas. 2011. Taxonomic composition of the Alamo Wash local fauna from the Upper Cretaceous Ojo Alamo Formation (Naashoibito Member), San Juan Basin, New Mexico. In R. M. Sullivan, S. G. Lucas, & J. A. Spielmann (eds.), Fossil Record 3. New Mexico Museum of Natural History and Science Bulletin 53:216-271 [M. Carrano/M. Carrano/P. Mannion] | |
| 15088 | ETE | B. S. Kues, J. W. Froehlich, J. A. Schiebout and S. G. Lucas. 1977. Paleontological survey, resource assessment, and mitigation plan for the Bisti-Star Lake Area, northwestern New Mexico. Report to the Bureau of Land Management, Albuquerque, New Mexico [M. Carrano/K. Maguire/M. Uhen] |
| 23604 | ETE | B. S. Kues, T. M. Lehman, and J. K. Rigby, Jr. 1980. The teeth of Alamosaurus sanjuanensis, a Late Cretaceous sauropod. Journal of Paleontology 54(4):864-869 [M. Carrano/M. Carrano] |
| 2212 | T. M. Lehman. 1981. The Alamo Wash local fauna: a new look at the old Ojo Alamo fauna. In S. G. Lucas, J. K. Rigby Jr., B. S. Kues (eds.), Advances in San Juan Basin Paleontology. New Mexico University Press, Albuquerque 189-221 [J. Alroy/J. Alroy/M. Carrano] | |
| 12486 | ETE | S. G. Lucas, N. J. Mateer, A. P. Hunt and F. M. O'Neill. 1987. Dinosaurs, the age of the Fruitland and Kirtland Formations, and the Cretaceous-Tertiary boundary in the San Juan Basin, New Mexico. J. E. Fassett and J. K. Rigby, Jr. (eds.), The Cretaceous-Tertiary Boundary in the San Juan and Raton Basins, New Mexico and Colorado, Geological Society of America Special Paper 209:35-50 [M. Carrano/M. Carrano/M. Carrano] |
| 12314 | ETE | R. S. Lull. 1933. A revision of the Ceratopsia or horned dinosaurs. Memoirs of the Peabody Museum of Natural History 3(3):1-175 [M. Carrano/M. Carrano/M. Carrano] |
| 19267 | ETE | N. J. Mateer. 1976. New topotypes of Alamosaurus sanjuanensis Gilmore (Reptilia: Sauropoda). Bulletin of the Geological Institutions of the University of Uppsala, New Series 6:93-95 [M. Carrano/M. Carrano] |
| 14787 | ETE | N. J. Mateer. 1981. The reptilian megafauna from the Kirtland Shale (Late Cretaceous) of the San Juan Basin, New Mexico. In S. G. Lucas, J. K. Rigby, Jr. & B. S. Kues (eds.), Advances in San Juan Basin Paleontology. University of New Mexico Press, Albuquerque 49-75 [M. Carrano/K. Maguire/M. Carrano] |
| 47166 | S. F. Poropat. 2013. Carl Wiman's sauropods: The Uppsala Museum of Evolution's collection. GFF (Geologiska Foreningen) 135(1):104-119 [P. Mannion/J. Tennant/M. Carrano] | |
| 66821 | R. M. Sullivan and S. G. Lucas. 2011. Charles Hazelius Sternberg and his San Juan Basin Cretaceous dinosaur collections: correspondence and photographs (1920–1925). In R. M. Sullivan, S. G. Lucas, & J. A. Spielmann (eds.), Fossil Record 3. New Mexico Museum of Natural History and Science Bulletin 53:429-471 [M. Carrano/M. Carrano] |