ammonites
Smith Clark's Quarry (tracks), Milford, level A (Triassic of the United States)

Where: Hunterdon County, New Jersey (40.6° N, 75.1° W: paleocoordinates 16.4° N, 20.3° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Perkasie Member (Passaic Formation), Norian (221.5 - 205.6 Ma)

• Unit O. Upper part of formation, equivalent to Middle Keuper; about 5100 m above base of Triassic

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; gray shale and gray sandstone

• "the footprints were impressed in gray shale and are preserved as natural casts on the under surface of a gray sandstone 4 to 6 cm. thick...narrow shrinkage cracks"

Size class: macrofossils

Preservation: cast, mold/impression, trace

Collected by S. Clark, J. Eyerman in 1885-1887; reposited in the AMNH, MCZ

Collection methods: quarrying,

• collected by John Eyerman

Primary reference: C. H. Hitchcock. 1889. Recent progress in ichnology. Proceedings of the Boston Society of Natural History 24(8):117-127 [M. Carrano/M. Carrano/M. Carrano] more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 46621: authorized by Matt Carrano, entered by Matt Carrano on 21.01.2005