Locality 8, Clarkston Mountains, Dictyonema beds (Ordovician of the United States)

Where: Box Elder County, Utah (41.9° N, 112.1° W: paleocoordinates 7.4° S, 80.4° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Garden City Formation, Canadian (485.4 - 457.3 Ma)

• 158 foot interval beginning at 913 feet above base of formation

Environment/lithology: shallow subtidal; lithified, massive, cherty/siliceous limestone and lithified, yellow, muddy limestone

• "Resistant, thinly laminated, aphanitic limestone, containing scattered chert nodules, in beds 2-4 feet thick, interlayered with thin, 6-inch to 1-foot beds of buff-weathered, shaly limestone and occasional 1- to 2-foot layers of intraformational conglomerate." Fossils in lowest beds.

Size class: macrofossils

Collected by R. J. Ross, Jr. in 1946-1947; reposited in the YPM

Primary reference: R. J., J.r. Ross. 1951. Stratigraphy of the Garden City Formation in northeastern Utah, and its trilobite faunas. Yale Peabody Museum of Natural History Bulletin 6:1-161 [S. Finnegan/S. Finnegan/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 103891: authorized by Melanie Hopkins, entered by Melanie Hopkins on 03.02.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Pterobranchia
 Graptoloidea - Anisograptidae
"Dictyonema cf. flabelliforme" = Rhabdinopora flabelliformis
"Dictyonema cf. flabelliforme" = Rhabdinopora flabelliformis Eichwald 1840 graptolite
Trilobita
 Asaphida - Asaphidae
"Kirkella sp." = Ptyocephalus
"Kirkella sp." = Ptyocephalus Agassiz 1843 trilobite