Hells Canyon: Lacian, Oregon

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Cardiida - Kalenteridae
Myoconchinae indet. Newell 1957
3 specimens
Bivalvia - Cardiida - Cardiidae
Septocardia sp. Hall 1877
113 specimens
Bivalvia - Cardiida - Palaeocarditidae
Palaeocardita silberlingi n. sp. Newton et al. 1987
113 specimens
Bivalvia - Carditida - Astartidae
Astarte sp. Sowerby 1816
5 specimens
Bivalvia - Carditida - Carditidae
Tutcheria densestriatum
6 specimens
? Tutcheria sp. Cox 1946
6 specimens
Bivalvia - Unionida - Pachycardiidae
Cardinioides josephus Newton et al. 1987
26 specimens
Bivalvia - Trigoniida - Myophoriidae
Erugonia canyonensis Newton et al. 1987
20 specimens
Bivalvia - Trigoniida - Trigoniidae
Minetrigonia sp. Kobayashi and Katayama 1938
1 specimen
Bivalvia - Trigoniida - Laevitrigoniidae
? Frenguelliella sp. Leanza 1942
1 specimen
Bivalvia - Arcida - Parallelodontidae
Parallelodon cf. monobensis Nakazawa 1955
24 specimens
Bivalvia - Pectinida - Plicatulidae
Plicatula sp. Lamarck 1801
3 specimens
Plicatula hekiensis Nakazawa 1955
31 specimens
Bivalvia - Pectinida - Limidae
Lima spinigera
5 specimens
? Plagiostoma sp. Sowerby 1814
3 specimens
Antiquilima sp. Cox 1943
23 specimens
Antiquilima vallieri n. sp. Newton et al. 1987
23 specimens
Pseudolimea naumanni (Kobayashi and Ichikawa 1951)
18 specimens
Bivalvia - Pectinida - Pectinidae
Pectinidae indet. Wilkes 1810
1 specimen
Pleuronectites sp. Schlotheim 1820
6 specimens
cf. Chlamys mojsisovicsi (Kobayashi and Ichikawa 1949)
3 specimens
Tosapecten subhiemalis (Kiparisova 1940)
6 specimens
Crenamussium concentricum Newton et al. 1987
37 specimens
Bivalvia - Ostreida - Bakevelliidae
? Gervillia sp. Defrance 1820
8 specimens
Gervillia angusta Munster 1838
24 specimens
recombined as Gervillia (Cultriopsis) angusta
Bivalvia - Ostreida - Cassianellidae
Cassianella angusta Bittner 1891
136 specimens
Bivalvia - Ostreida - Pteriidae
? Arcavicula sp. Cox 1964
10 specimens
Bivalvia - Ostreida - Gryphaeidae
Liostrea newelli Newton et al. 1987
290 specimens
Bivalvia - Ostreida - Ostreidae
Lopha sp. Röding 1798
134 specimens
? Lopha sp. Röding 1798
17 specimens
Bivalvia - Myalinida - Mysidiellidae
Mysidiella cordillerana Newton et al. 1987
28 specimens
recombined as Promysidiella cordillerana
? Timoria ? timorensis Krumbeck 1924
5 specimens
    = Mysidiella newtonae Waller and Stanley 2005
Waller and Stanley 2005
Bivalvia - Myalinida - Myalinidae
Mysidioptera williamsi (McLearn 1941)
50 specimens
original and current combination Aviculomyalina williamsi
Bivalvia - Nuculida
Nuculoida indet. Dall 1889
1 specimen
corrected as Nuculida
see common names

Geography
Country:United States State/province:Oregon
Coordinates: 45.0° North, 116.0° West (view map)
Paleocoordinates:19.1° North, 52.4° West
Basis of coordinate:stated in text
Geographic resolution:small collection
Time
Period:Triassic Epoch:Late/Upper Triassic
Stage:Norian 10 m.y. bin:Triassic 4
Key time interval:Lacian
Age range of interval:227.00000 - 216.70000 m.y. ago
Stratigraphy
Formation:Martin Bridge
Stratigraphic resolution:group of beds
Stratigraphy comments: On a regional scale, the Martin Bridge Limestone can be characterized as a discontinuously preserved Carnian-Norian carbonate unit that occurs in northeastern Oregan and western Idaho. The Martin Bridge overlies the Seven Devils Group in apparent unconformable contact and is in turn stratigraphically overlain by the Late Triassic-Early Jurassic shale and limestone of the Hurwal Fromation.
JA: from the early Norian Mojsisovicsites kerri Zone
Lithology and environment
Primary lithology: lithified "limestone"
Includes fossils?Y
Environment:shallow subtidal indet.
Geology comments: Martin Bridge limestone represents a deepening-upward sequence ranging from supratidal carbonate lithofacies, with the silicified shell beds corresponding to the upper part of this sequence.
Taphonomy
Modes of preservation:body,replaced with silica
Size of fossils:macrofossils
Collection methods and comments
Collection excludes:some macrofossils
Collection methods:field collection
Reason for describing collection:paleoecologic analysis
Metadata
Also known as:Martin Bridge Limestone
Database number:33294
Authorizer:D. Bottjer, A. Dunhill Enterer:N. Bonuso, B. Allen
Modifier:M. Manojlovic Research group:marine invertebrate
Created:2003-07-24 15:04:29 Last modified:2016-09-19 13:21:03
Access level:the public Released:2003-07-24 15:04:29
Creative Commons license:CC BY
Reference information

Primary reference:
8853. C. R. Newton, M. T. Whalen, J. B. Thompson, N. Prins, and D. Delallia. 1987. Systematics and paleoecology of Norian (Late Triassic) bivalves from a tropical island arc: Wallowa Terrane, Oregan. Memoir - Paleontological Society 22:1-83 [D. Bottjer/N. Bonuso/S. Kolbe]

Secondary references:

12832 T. R. Waller and G. D. Stanley. 2005. Middle Triassic pteriomorphian Bivalvia (Mollusca) from the New Pass Range, west-central Nevada: systematics, biostratigraphy, paleoecology, and paleobiogeography. Journal of Paleontology 79(Supplement):1-64 [W. Kiessling/W. Kiessling/W. Kiessling]