Where: Alaska (65.0° N, 141.0° W: paleocoordinates 3.0° S, 38.7° W)
• coordinate estimated from map
• outcrop-level geographic resolution
When: McCann Hill Chert Formation, Emsian (407.6 - 393.3 Ma)
• 200-800 ft. thick
Environment/lithology: open shallow subtidal; cherty/siliceous shale and limestone
Size class: macrofossils
Preservation: mold/impression, adpression, replaced with pyrite
Collected by Churkin and Carter; reposited in the USNM
Collection methods: chemical,
• etched out of limestone with Formic Acid
Primary reference: M. Churkin and C. Carter. 1970. Devonian tentaculitids of east-central Alaska; systematics and biostratigraphic significance. Journal of Paleontology 44(1):51-68 [A. Miller/J. Wittmer]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 79135: authorized by Arnold Miller, entered by Jacalyn Wittmer on 26.02.2008
Creative Commons license: CC BY (attribution)
Taxonomic list
Conodonta | |
Conodonta indet. conodont | |
Gnathostomata | |
Actinopterygii indet. ray-finned fish | |
Tentaculita | |
Styliolina sp. Karpinsky 1884 | |
Striatostyliolina sp. Boucek and Prantl 1961 | |
Brachiopoda | |
Brachiopoda indet. Cuvier 1805 | |
Lophophorata | |
Multiconus sp. Ljaschenko 1955 | |
Bryozoa | |
Bryozoa indet. Ehrenberg 1831 | |
Trilobita | |
Trilobita indet. Walch 1771 trilobite | |
Deuteropoda | |
Ostracoda indet. Latreille 1802 ostracod | |
Anthozoa | |
Anthozoa indet. Ehrenberg 1834 |