Mixed Tethyan and McCloud Belt Rugose Corals and Fusulinids in an Upper Triassic Conglomerate, Central Oregon

Colonial rugose corals ranging in age from Carboniferous to Late Triassic and Early Permian (Cisuralian) fusulinids have been recovered from cobbles in a conglomerate in the Upper Triassic Brisbois Member of the Vester Formation in the Izee terrane in central Oregon. Early Permian (late Sakmarian or...

Full description

Saved in:
Bibliographic Details
Published in:Journal of paleontology 2013-09, Vol.87 (5), p.909-921
Main Authors: Nestell, Merlynd K, Stevens, Calvin H
Format: Article
Language:English
Subjects:
Age
Ammonoidea
Anthozoa
Big Flat
Brisbois Member
Carboniferous
Changmeia
Cnidaria
Cobbles
Colleges & universities
Conglomerates
Corwenia ashwillensis
Eoparafusulina
Fauna
faunal studies
Foraminifera
Fossils
Fusulinina
Genera
Geology
Grant County Oregon
Invertebrata
invertebrate
Limestone
Lower Permian
McCloud Belt
Mesozoic
microfossils
morphology
New species
new taxa
Oregon
paleogeography
Paleontology
Paleozoic
Permian
Polar regions
Protista
Rugosa
Schwagerina
Septum
Snow Mountain
Specimens
Stauriida
taxonomy
Tethys
Triassic
United States
Upper Triassic
Vester Formation
Yokoyamaella oregonensis
Zoantharia
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Colonial rugose corals ranging in age from Carboniferous to Late Triassic and Early Permian (Cisuralian) fusulinids have been recovered from cobbles in a conglomerate in the Upper Triassic Brisbois Member of the Vester Formation in the Izee terrane in central Oregon. Early Permian (late Sakmarian or early Artinskian) fusulinids typical of those present in the Coyote Butte Limestone in the nearby Grindstone terrane (part of the allochthonous McCloud Belt) include Eoparafusulina, Pseudofusulinella, Chalaroschwagerina, and Schwagerina. The presence of these fusulinid genera and the Pennsylvanian coral Heritschioides?, which is mostly restricted to the McCloud Belt, suggest these particular cobbles were derived from limestone in that belt. The Early Permian fusulinids Changmeia bostwicki new species and Changmeia bigflatensis new species, and the Early Permian corals Yokoyamaella? oregonensis new species and Yokoyamaella? sp. 1, all of which have Tethyan affinities, occur rarely in other cobbles. The presence of definitive fossils from the two different realms in a conglomerate associated with beds containing Late Triassic ammonoids indicates that by Late Triassic time a fragment of a Tethyan terrane was close to or had been amalgamated with a terrane belonging to the McCloud Belt.
ISSN:0022-3360
1937-2337
DOI:10.1666/12-138