D193-SD Yukon River Valley section (Ordovician to of the United States)
Where: Alaska (65.0° N, 141.2° W)
• Paleocoordinates: 10.9° N, 114.8° W (Wright 2013)
When: Road River Formation, Ashgill to Ashgill (449.5 - 432.9 Ma)
Environment/lithology: offshore; lithified, cherty/siliceous shale
Size class: macrofossils
Collected by Churkin in 1962
Primary reference: M. Churkin, Jr. and E. E. Brabb. 1965. Ordovician, Silurian, and Devonian biostratigraphy of east-central Alaska. Bulletin of the American Association of Petroleum Geologists 49(2):172-185 [A. Miller/S. Kolbe]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 114845: authorized by Arnold Miller, entered by Sarah Kolbe on 25.08.2011
Creative Commons license: CC0 (CC0)
Taxonomic list
Show authors, comments, and common names
| Pterobranchia | |
"Climacograptus cf. scalaris normalis" = Normalograptus normalis, "Climacograptus cf. hughesi" = Metaclimacograptus hughesi
"Climacograptus cf. scalaris normalis" = Normalograptus normalis Lapworth 1877 graptolite
"Climacograptus cf. hughesi" = Metaclimacograptus hughesi Nicholson 1869 graptolite | |
|
? Dimorphograptus confertus graptolite | |
|
Climacograptus sp. Hall 1865 climacograptid | |
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? Orthograptus sp. Lapworth 1873 graptolite | |