Primary nodules, Phosphatic conglomerate of the Arnagar Greensand, Madsegrav, Bo (Cretaceous of Denmark)

Where: Denmark (55.1° N, 14.8° E: paleocoordinates 44.2° N, 18.5° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Leymeriella regularis ammonoid zone, Arnager Greensand Formation, Early/Lower Albian (112.0 - 109.0 Ma)

• "Three time intervals are represented in the phosphatic conglomerate. The ammonites from the primary nodules represent two time intervals in the Lower Albian (Leymeriella tardefurcata and Douvilleiceras mammilatum Zones)."

• bed-level stratigraphic resolution

Environment/lithology: shoreface; poorly lithified conglomerate

• "40 cm thick conglomerate with complexly built phosphatized pebbles and cobbles (hiatus concretions)" 30 cm above the base of the Arnager Greensand Formation

Size class: macrofossils

Preservation: mold/impression

Collection methods: Museum repositories: MGUH, MMH and MM

Primary reference: W. J. Kennedy, J. M. Hancock, and W. K. Christensen. 1981. Albian and Cenomanian ammonites from the island of Bornholm. Bulletin of the Geological Society of Denmark 29:203-244 [A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 71077: authorized by Martin Aberhan, entered by Sabine Nürnberg on 18.04.2007, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

• focus on ammonites
Cephalopoda
 Ammonitida - Cleoniceratidae
Anadesmoceras cf. strangulatum Casey 1954 ammonite
Pachygrycia sp. Jeletzky 1981 ammonite
2 of Sonneratia kitchini, 1 of Sonneratia sp. in Kennedy et al.
Arcthoplitinae indet. Lehmann et al. 2013 ammonite
? Bellidiscus sp. Savel'ev 1973 ammonite
Bellidiscus cf. subplanus Savel'ev 1973 ammonite
? Arcthoplites sp. ammonite
Part of Sonneratia sp., Pseudosonneratia sp. in Kennedy et al.
Arcthoplites sp. ammonite
P. occidentalis pluricostata
"? Subarcthoplites sp." = Arcthoplites (Subarcthoplites) Casey 1954 ammonite
Part of Cleoniceras sp. in Kennedy et al.
? Grycia sp. Imlay 1961 ammonite
 Ammonitida - Leymeriellidae
Leymeriella (Neoleymeriella) regularis d'Orbigny 1841 ammonite
one specimen + one doubtfully included specimen
 Ammonitida - Desmoceratidae
? Leconteites sp. Casey 1954 ammonite
Part of Anadesmoceras costatum in Kennedy et al.
? Kennicottia sp. Imlay 1959 ammonite
 Ammonitida - Schloenbachiidae
? Schloenbachiidae indet. Parona and Bonarelli 1897 ammonite
 Ammonitida - Acanthohoplitidae
Hypacanthoplites sp. Spath 1923 ammonite