ammonites
R01-03, Williams Canyon (Ordovician of the United States)

Where: El Paso County, Colorado (38.9° N, 105.0° W: paleocoordinates 13.7° S, 81.1° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Manitou Limestone Formation, Blackhillsian (478.6 - 471.8 Ma)

• from Ross et al. (1982)

• formation-level stratigraphic resolution

Environment/lithology: lithified, coarse-grained limestone

• The Manitou formation consists of finely to coarsely crystalline limestone and minor amounts of dolomite at its type location (from http://home.earthlink.net/~gesuchan/Fossil/Manitou_Park/Field_Trip.htm)

Size class: macrofossils

Preservation: replaced with silica

Reposited in the USNM

Collection methods: chemical

Primary reference: J. Fręda and D. M. Rohr. 2006. Shell heterostrophy in Early Ordovician Macluritella Kirk 1927 and its implications for phylogeny and classification of Macluritoidea (Gastropoda). Journal of Paleontology 80(2):264-271 [P. Wagner/P. Wagner] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 58966: authorized by Pete Wagner, entered by Pete Wagner on 01.03.2006