Biggs Farm, New Castle Co. [Mount Laurel Sand]: Late/Upper Campanian, Delaware
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Thecostraca
- Scalpellomorpha
- Scalpellidae
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Virgiscalpellum gabbi
(Pilsbry 1933)
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Zullo 1987 | |||||||||
ssp. heintzi, cf. ssp. apertus | ||||||||||
Arcoscalpellum bakeri
Collins 1973
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Zullo 1987 | |||||||||
Arcoscalpellum withersi
Collins 1973
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Zullo 1987 | |||||||||
Thecostraca
- Archaeolepadomorpha
- Myolepadidae
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Brachylepas solida n. sp.
Zullo 1987
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Zullo 1987 | |||||||||
recombined as Myolepas solida | ||||||||||
Thecostraca
- Calanticomorpha
- Cretiscalpellidae
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Cretiscalpellum homseyi n. sp.
Zullo 1987
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Zullo 1987 | |||||||||
Cephalopoda
- Ammonitida
- Sphenodiscidae
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? Eulophoceras sp.
Hyatt 1903
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Cephalopoda
- Ammonitida
- Pachydiscidae
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Pachydiscus (Pachydiscus) sp.
Zittel 1884
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Cephalopoda
- Ammonitida
- Placenticeratidae
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Placenticeras sp.
Meek 1876
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Placenticeras cf. placenta
(DeKay 1828)
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Cephalopoda
- Ammonitida
- Baculitidae
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Baculites undatus
Stephenson 1941
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Baculites ovatus
(Say 1820)
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Cephalopoda
- Ammonitida
- Nostoceratidae
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Anaklinoceras tenuicostatum
Kennedy and Cobban 1994
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Anaklinoceras reflexum
Stephenson 1941
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Didymoceras cheyennense
(Meek and Hayden 1856)
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recombined as Didymoceras cheyenense | ||||||||||
Nostoceras (Nostoceras) draconis
(Stephenson 1941)
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recombined as Didymoceras draconis | ||||||||||
Cephalopoda
- Ammonitida
- Diplomoceratidae
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Oxybeloceras meekanum
(Whitfield 1877)
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recombined as Spiroxybeloceras meekanum | ||||||||||
Solenoceras annulifer
(Morton 1824)
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Cephalopoda
- Ammonitida
- Scaphitidae
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Jeletzkytes compressus
(Roemer 1841)
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Hoploscaphites vistulensis
Blaszkiewicz 1980
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see common names |
Geography
Country: | United States | State/province: | Delaware | County: | New Castle |
Coordinates: | 39.8° North, 75.6° West (view map) | ||||
Paleocoordinates: | 39.2° North, 45.5° West | ||||
Basis of coordinate: | based on nearby landmark | ||||
Geographic resolution: | outcrop |
Time
Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
Stage: | Campanian | 10 m.y. bin: | Cretaceous 7 |
Key time interval: | Late/Upper Campanian | Ammonoid zone: | Didymoceras cheyennense |
Age range of interval: | 83.50000 - 70.60000 m.y. ago |
Stratigraphy
Formation: | Mount Laurel Sand | ||||
Stratigraphic resolution: | group of beds | ||||
Stratigraphy comments: STRATIGRAPHIC RELATIONS: From the Mount Laurel Sand, which regionally overlies the Marshalltown Fm (Campanian), and is unconformably overlain by the Columbia Fm (Quaternary). AGE: Late Campanian, on the basis of ammonite biostratigraphy; Didymoceras cheyennense zone and part of the Baculites compressus zone. STRATIGRAPHIC POSITION: From beds within section of 8 ft in thickness. |
Lithology and environment
Primary lithology: | burrows,phosphatic lithified silty sandstone |
Includes fossils? | Y |
Lithology description: SPECIFIC LITHOLOGY: Burrowed silty sand. LITHIFICATION: Lithified, on the basis of figured specimens. | |
Environment: | coastal indet. |
Geology comments: ENVIRONMENT: Shallow marine siliciclastic setting. |
Taphonomy
Modes of preservation: | cast,mold/impression,replaced with phosphate |
Size of fossils: | macrofossils |
Preservation of anatomical detail: | poor |
Collection methods and comments
Collection excludes: | some macrofossils |
Collection methods: | surface (in situ),field collection,survey of museum collection |
Reason for describing collection: | taxonomic analysis |
Museum repositories: | USNM |
Collection method comments: COLLECTORS: Multiple collectors, including members of the Monmouth Amateur Paleontologists Society (MAPS). REPOSITORY: USNM and Monmouth Amateur Paleontologists Society (MAPS). | |
Taxonomic list comments:COVERAGE: Limited to ammonoids described in taxonomic publication. NOMENCLATURE: Authoritative publication, with modern nomenclature, and species-resolution identifications. |
Metadata
Database number: | 83133 | ||
Authorizer: | A. Hendy, M. Clapham | Enterer: | A. Hendy, M. Clapham |
Modifier: | A. Hendy | Research group: | marine invertebrate |
Created: | 2008-08-07 16:16:24 | Last modified: | 2013-11-25 13:37:23 |
Access level: | the public | Released: | 2008-08-07 16:16:24 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
27915. | W. J. Kennedy and W. A. Cobban. 1994. Upper Campanian ammonites from the Mount Laurel Sand at Biggs Farm, Delaware. Journal of Paleontology 68(6):1285-1305 [A. Hendy/A. Hendy] |
Secondary references:
72641 | V. A. Zullo. 1987. Scalpelloid and brachylepadomorph barnacles (Cirripedia, Thoracica) from the Upper Cretaceous Mt. Laurel Sand, Delaware. Journal of Paleontology 61:333-345 [M. Clapham/M. Clapham] |