Zone V3b, Ny Friesland (Ordovician of Norway)

Where: Spitsbergen, Norway (79.8° N, 17.8° E: paleocoordinates 29.8° N, 39.0° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Psephosthenaspis microspinosa small shelly zone, Olenidsletta Member (Valhallfonna Formation), Whiterockian (471.8 - 457.5 Ma)

• While collections were made throughout section, only ranges of trilobite species are reported. Zone V3b comprises meters 120-145 of the Olenidsletta Member. Correlates with part of "zone L" of Ross 1951, Hintze 1951, 1952.

• group of beds-level stratigraphic resolution

Environment/lithology: slope; lithified, black limestone and lithified, black shale

• "The dominant lithologies of this part of the section are finely crystalline black limestones and shales, the former often with perfectly regular fine laminations, having a concoidal fracture and, when broken, emitting a strong, bituminous or sulphureous odor." Fortey 1974

Size class: macrofossils

Collected by R. A. Fortey in 1967

Primary reference: R. A. Fortey. 1980. The Ordovician trilobites of Spitsbergen. III. Remaining trilobites of the Valhallfonna Formation. Norsk Polarinstitutt Skrifter 171:1-163 [M. Hopkins/M. Hopkins]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 106477: authorized by Melanie Hopkins, entered by Melanie Hopkins on 18.03.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

• Lingulids and graptolites also present (see Fortey and Brunton 1973)
 Olenida - Olenidae
"Triarthrus papulosus" = Bienvillia papulosus Fortey 1974 trilobite
Cloacaspis senilis Fortey 1974 trilobite
Hypermecaspis brevifrons Fortey 1974 trilobite
Hypermecaspis latigena Fortey 1974 trilobite
 Proetida - Telephinidae
Carolinites ekphymosus Fortey 1975 trilobite
 Asaphida - Remopleuridae
Remopleuridae indet. Hawle and Corda 1847 trilobite
 Asaphida - Nileidae
Peraspis omega Fortey 1975 trilobite
Poronileus jugatus Fortey 1975 trilobite
 Asaphida - Raphiophoridae
Endymionia clavaria Fortey 1975 trilobite
Globampyx trinucleoides Fortey 1975 trilobite