Silver Springs Mtn., Dunderberg Shale, Dresbachian-Dicanthopyge zone (Cambrian of the United States)

Where: Utah (40.7° N, 111.5° W: paleocoordinates 6.5° S, 86.6° W)

• coordinate based on nearby landmark

When: Dicanthopyge zone, Dunderberg Shale Formation, Dresbachian (497.0 - 485.4 Ma)

• "Dresbachian-Dicanthopyge zone"

Environment/lithology: marine; limestone and shale

• "90m: sh and silty, thin-bedded ls (correlative with Orr Fm., outer detrital belt (see Palmer 1971) (BA4), geosynclinal"

Size class: macrofossils

Collection methods: "Collection 5986-CO"

Primary reference: R. A. Robinson and A. R. Palmer. 1968. Revision of Cambrian stratigraphy Silver Island Mountains, Utah. AAPG Bulletin 52:167-171 [M. Uhen/J. Ju/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 239: authorized by Jack Sepkoski, entered by Mike Sommers on 20.11.1998

Creative Commons license: CC BY (attribution)

Taxonomic list

• "R.A.Robinson and A.R.Palmer 1968. Revision of Camb. strat., Silver Island Mtns., UT. AAPG Bull. 52:167-171"
Show authors, comments, and common names
Trilobita
 Ptychopariida - Crepicephalidae
Crepicephalidae indet.
Crepicephalidae indet. Kobayashi 1935 trilobite
 Olenida - Aphelaspidae
Dicanthopyge sp.
Dicanthopyge sp. Palmer 1965 trilobite
originally entered as "Dicanthropyge sp."
Artiopoda
 Agnostida - Diplagnostidae
Pseudagnostus sp.
Pseudagnostus sp. Jaekel 1909
Lingulata
 Acrotretida - Acrotretidae
Angulotreta sp.
Angulotreta sp. Palmer 1954
originally entered as "Angulotrreta sp."
Paterinata
 Paterinida - Paterinidae
Micromitra sp.
Micromitra sp. Meek 1873
Helcionelloida
 Helcionellida - Pelagiellidae
Pelagiella sp.
Pelagiella sp. Matthew 1895