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
Virgiscalpellum gabbi (Pilsbry 1933)
Zullo 1987
ssp. heintzi, cf. ssp. apertus
Arcoscalpellum bakeri Collins 1973
Zullo 1987
Arcoscalpellum withersi Collins 1973
Zullo 1987
Thecostraca - Archaeolepadomorpha - Myolepadidae
Brachylepas solida n. sp. Zullo 1987
Zullo 1987
recombined as Myolepas solida
Thecostraca - Calanticomorpha - Cretiscalpellidae
Cretiscalpellum homseyi n. sp. Zullo 1987
Zullo 1987
Cephalopoda - Ammonitida - Sphenodiscidae
? Eulophoceras sp. Hyatt 1903
Cephalopoda - Ammonitida - Pachydiscidae
Pachydiscus (Pachydiscus) sp. Zittel 1884
Cephalopoda - Ammonitida - Placenticeratidae
Placenticeras sp. Meek 1876
Placenticeras cf. placenta (DeKay 1828)
Cephalopoda - Ammonitida - Baculitidae
Baculites undatus Stephenson 1941
Baculites ovatus (Say 1820)
Cephalopoda - Ammonitida - Nostoceratidae
Anaklinoceras tenuicostatum Kennedy and Cobban 1994
Anaklinoceras reflexum Stephenson 1941
Didymoceras cheyennense (Meek and Hayden 1856)
recombined as Didymoceras cheyenense
Nostoceras (Nostoceras) draconis (Stephenson 1941)
recombined as Didymoceras draconis
Cephalopoda - Ammonitida - Diplomoceratidae
Oxybeloceras meekanum (Whitfield 1877)
recombined as Spiroxybeloceras meekanum
Solenoceras annulifer (Morton 1824)
Cephalopoda - Ammonitida - Scaphitidae
Jeletzkytes compressus (Roemer 1841)
Hoploscaphites vistulensis Blaszkiewicz 1980
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]