Biggs Farm, St. George (Cretaceous of the United States)

Where: New Castle County, Delaware (39.6° N, 75.6° W: paleocoordinates 40.1° N, 51.3° W)

• coordinate estimated from map

When: Mount Laurel Formation (Monmouth Group), Early/Lower Maastrichtian (70.6 - 66.0 Ma)

• formation-level stratigraphic resolution

Environment/lithology: terrestrial; medium-grained, glauconitic, brown, green, red, white, silty, sandy quartzite

• Gr ay, gr e en, whi t e to red~brown, gl auconi t i c , f ine to

•medium s i l ty qua r t z s and. Cont a ins a ma c roinve r t ebr a t e

•f auna of we l l ove r a hundr ed spe c i e s . Thi s forma t ion

•a l so cont a ins a f a i r amount of sha rk ma t e r i a l . The

•l i thology and fos s i l s indi c a t e tha t i t wa s depos i t ed

•dur ing a s l ight r egr e s s ion

Size classes: macrofossils, mesofossils

Primary reference: E. M. Lauginiger and E. F. Hartstein. 1983. A guide to fossil sharks, skates, and rays from the Chesapeake and Delaware Canal area, Delaware. Open File Report - Delaware Geological Survey 21:1-63 [M. Uhen/M. Shalap/M. Shalap]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 126598: authorized by Mark Uhen, entered by Margaret Shalap on 09.04.2012, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Squatiniformes - Squatinidae
Squatina hassei Leriche 1929 angel shark
 Sclerorhynchiformes - Sclerorhynchidae
Ischyrhiza mira Leidy 1856 elasmobranch
 Lamniformes - Anacoracidae
Pseudocorax granti mackerel shark
Squalicorax kaupi Agassiz 1843 crow shark
Squalicorax pristodontus Agassiz 1843 crow shark
 Lamniformes - Cretoxyrhinidae
Cretolamna appendiculata Agassiz 1843 mackerel shark
Cretolamna appendiculata pachyrhiza
 Lamniformes - Odontaspididae
"Odontaspis holmdelensis" = Synodontaspis holmdelensis Cappetta and Case 1975 sand tiger shark
Odontaspis samhammeri sand tiger shark
Hypotodus aculeatus sand tiger shark
Reptilia
 Squamata - Mosasauridae
Halisaurus platyspondylus Marsh 1869 mosasaur