Flower Mound (SMU Loc. 303): Middle Cenomanian, Texas
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
- Testudines
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Chelonia indet.
(Latreille 1800)
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Head 1998 | 1 specimen | ||||||||
| synonym of Testudines | ||||||||||
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Reptilia
- Archosauria
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Archosauria indet.
Cope 1869
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Head 1998 | 1 individual | ||||||||
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Reptilia
- Crocodylia
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Crocodylia indet.
(Owen 1842)
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Head 1998 | 2 individuals | ||||||||
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Reptilia
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Hadrosauridae indet.
Cope 1869
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1 individual | |||||||||
| (1 measurement) | ||||||||||
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= Protohadros byrdi n. gen., n. sp.
Head 1998
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Head 1998 | |||||||||
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Pisces
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Pisces indet.
Linnaeus 1758
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Head 1998 | 1 specimen | ||||||||
| synonym of Osteichthyes | ||||||||||
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Bivalvia
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Bivalvia indet.
Linnaeus 1758
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Head 1998 | |||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Texas | County: | Denton |
| Coordinates: | 33.0° North, 97.1° West (view map) | ||||
| Paleocoordinates: | 31.4° North, 61.8° West | ||||
| Basis of coordinate: | based on political unit | ||||
| Geographic resolution: | small collection |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Cenomanian | 10 m.y. bin: | Cretaceous 5 |
| *Period: | Late/Upper Cretaceous | *Epoch: | Gallic |
| *International age/stage: | Middle Cenomanian | ||
| Key time interval: | Middle Cenomanian | Ammonoid zone: | Conlinoceras tarrantense |
| Age range of interval: | 100.50000 - 93.90000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Geological group: | Woodbine | Formation: | Lewisville | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: specimen located 2.75 m above base of section, orig. Arlington Mbr. | |||||
Lithology and environment
| Primary lithology: | black,gray carbonaceous mudstone |
| Secondary lithology: | "cross stratification",pyritic lithified sandstone |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: "The mudstone units are dary gray to black, and are commonly sulfur stained. The units are locally fissile, and gypsum crystals and carbonaceous debris occur in many of the layers, increasing in concentration upsection. The sandstone units are calcite cemented, cross-bedded, medium to fine grained, and lenticular with gray silt lenticles. As with the mudstones, the sandstones are sulfur stained and contain sporadic pyrite modules. Moviung upsection, the sands become more massive and less lenticular with less pyrite and sulfur concentrations. Large, diagenetic gypsum crystals occur in the uppermost layers of the section." | |
| Environment: | deltaic indet. |
| Geology comments: "The stratigraphy...reflects the deltaic deposits characteristic of the Woodbine Formation in North Texas...with the sandstone and mudstone alternation representing a progression from delta-plain toward channel or sandbar systems." | |
Taphonomy
| Modes of preservation: | body,trace |
| Size of fossils: | macrofossils |
| Spatial orientation: | random |
| Preservation of anatomical detail: | excellent |
| Articulated whole bodies: | none |
| Associated major elements: | many |
| Disassociated major elements: | some |
| Size sorting: | very poor |
| Fragmentation: | frequent |
| Encrustation: | none |
| Temporal resolution: | time-averaged |
| Spatial resolution: | parautochthonous |
Collection methods and comments
| Collection excludes: | some genera,species names |
| Collection methods: | selective quarrying,surface (float),surface (in situ),chemical,field collection |
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: Collection was made at one time, but from different levels in the 6-m section. Hadrosaur from 2.75 m above section base, crocodilian from 1 m above this, fish and bivalves at section top. Turtle, archosaur phalanx, and another croc element from unspecific locations in section. | |
Metadata
| Database number: | 24888 | ||
| Authorizer: | M. Carrano | Enterer: | M. Carrano |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2002-08-22 08:39:29 | Last modified: | 2022-02-01 13:22:27 |
| Access level: | the public | Released: | 2002-08-22 08:39:29 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 14746. | ETE | J. J. Head. 1996. A primitive hadrosaur (Dinosauria: Ornithischia) from the Cenomanian of Texas and its implications for hadrosaurian phylogenetic and biogeographic histories. Journal of Vertebrate Paleontology 16(3, suppl.):40A [M. Carrano/M. Carrano] |
Secondary references:
| 50540 | K. Carpenter and Y. Ishida. 2010. Early and "middle" Cretaceous iguanodonts in time and space. Journal of Iberian Geology 36(2):145-164 [M. Carrano/M. Carrano] | |
| 6977 | J. J. Head. 1998. A new species of basal hadrosaurid (Dinosauria, Ornithischia) from the Cenomanian of Texas. Journal of Vertebrate Paleontology 18(4):718-738 [M. Carrano/M. Carrano/M. Carrano] | |
| 77809 | C. R. Noto. 2015. Archosaur fossil localities in the Woodbine Formation (Cenomanian) of north central Texas. In C. R. Noto (ed.), Early- and Mid-Cretaceous Archosaur Localities of North-Central Texas. Guidebook for the field trip held October 13, 2015 in conjunction with the 75th Annual Meeting of the Society of Vertebrate Paleontology in Dallas, Texas 38-50 [M. Carrano/M. Carrano] |