OR-146 Morgan Mountain, Izee (Triassic of the United States)

Where: Grant County, Oregon (44.1° N, 119.4° W: paleocoordinates 18.8° N, 55.2° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Rail Cabin Argillite Formation, Norian (228.0 - 208.5 Ma)

• 55.8 m above contact, (Late Carnian?)Early to late Middle Norian

• bed-level stratigraphic resolution

Environment/lithology: basinal (siliceous); lithified, cherty/siliceous mudstone

• black siliceous mudstone

Size class: microfossils

Primary reference: C. D. Blome. 1983. Upper Triassic Capnuchosphaeridae and Capnodocinae (Radiolaria) from east-central Oregon. Micropaleontology 29(1):11-49 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 95129: authorized by Wolfgang Kiessling, entered by Uta Merkel on 07.04.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

• abundance data: rare: 1-2 specimens, common: 3-6 specimens, abundant: >6 specimens
Show authors, comments, and common names
Protozoa
 Spumellaria - Hexaporobrachiidae
Icrioma sp., Icrioma transversa
Icrioma sp. De Wever 1979 radiolarian
Icrioma transversa Blome 1983 radiolarian
 Spumellaria - Capnuchosphaeridae
Sarla sp., Sarla aff. vetusta, Sarla delicata, Sarla plena, Capnuchosphaera sp., Capnuchosphaera smithorum, Capnuchosphaera schenki, Capnuchosphaera colemani, Capnuchosphaera deweveri, Catoma sp., Catoma geometrica
Sarla sp. Pessagno et al. 1979 radiolarian
Sarla aff. vetusta Pessagno et al. 1979 radiolarian
Sarla delicata Blome 1983 radiolarian
Sarla plena Blome 1983 radiolarian
Capnuchosphaera sp. De Wever 1979 radiolarian
Capnuchosphaera smithorum Blome 1983 radiolarian
Capnuchosphaera schenki Blome 1983 radiolarian
Capnuchosphaera colemani Blome 1983 radiolarian
Capnuchosphaera deweveri Kozur and Mostler 1979 radiolarian
Catoma sp. Blome 1983 radiolarian
Catoma geometrica Blome 1983 radiolarian
 Spumellaria - Pantanelliidae
Renzium sp., Renzium adversum, Loffa sp., Capnodoce sp., Capnodoce copiosa, Capnodoce kochi, Capnodoce media, Capnodoce beaulieui, Capnodoce baldiensis, Capnodoce antiqua, Capnodoce minuscula, Capnodoce insueta, Capnodoce traversi, Capnodoce angusta
Renzium sp. Blome 1983 radiolarian
Renzium adversum Blome 1983 radiolarian
Loffa sp. Pessagno et al. 1979 radiolarian
Capnodoce sp. De Wever 1979 radiolarian
Capnodoce copiosa Blome 1983 radiolarian
Capnodoce kochi Blome 1983 radiolarian
Capnodoce media Blome 1983 radiolarian
Capnodoce beaulieui Blome 1983 radiolarian
Capnodoce baldiensis Blome 1983 radiolarian
Capnodoce antiqua Blome 1983 radiolarian
Capnodoce minuscula Blome 1983 radiolarian
Capnodoce insueta Blome 1983 radiolarian
Capnodoce traversi Pessagno et al. 1979 radiolarian
Capnodoce angusta Blome 1983 radiolarian