Also known as Dinosaur Ridge, Stop 13, mangrove swamp

Where: Jefferson County, Colorado (39.7° N, 105.2° W: paleocoordinates 38.5° N, 64.4° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Muddy Sandstone Formation (Dakota Group), Albian to Albian (113.0 - 93.5 Ma)

• originally considered upper part of South Platte Fm., now "the middle to upper part" of the Muddy Formation, within Sequence 3

•

•Sequence 3 generally spans the Albian–Early Cenomanian, see Lockley et al. 1992

• group of beds-level stratigraphic resolution

Environment/lithology: mire or swamp; lithology not reported

Size class: macrofossils

Preservation: mold/impression, trace

Collected by Chamberlain, Lockley in 1995-

Collection methods: surface (in situ),

• Site originally discovered by Chamberlain and later further excavated by Lockley et al. (1995-)

Primary reference: M. G. Lockley. 1987. Dinosaur footprints from the Dakota Group of eastern Colorado. The Mountain Geologist 24(4):107-122 [M. Carrano/M. Carrano]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 66901: authorized by Matthew Carrano, entered by Matthew Carrano on 23.10.2006

Creative Commons license: CC BY (attribution)