Where: Yukon, Canada (65.3° N, 140.9° W: paleocoordinates 0.0° N, 0.0° E)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Fifteenmile Group, Tonian (1000.0 - 850.0 Ma)
• Originally assigned to "Unit 5" of the upper Tindir Group, and thought to be either latest Neoproterozoic or earliest Cambrian. Stratigraphic revisions by Macdonald et al. (2010) determined that the unit is the upper part of the Fifteenmile Group and U/Pb radiometric ages constrained the fossiliferous units to between 811.5 and 717.4 Ma.
• bed-level stratigraphic resolution
Environment/lithology: deep subtidal ramp; lithified, gray, cherty/siliceous lime mudstone
Size class: microfossils
Preservation: permineralized, original phosphate, original carbon
Collected by Carol Allison
Collection methods: bulk, chemical, peel or thin section,
• Repository: University of Alaska Museum
Primary reference: C. W. Allison and J. W. Hilgert. 1986. Scale microfossils from the early Cambrian of Northwest Canada. Journal of Paleontology 60:973-1015 [P. Cohen/P. Cohen]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 148715: authorized by Phoebe Cohen, entered by Phoebe Cohen on 25.07.2013, edited by Matthew Clapham
Creative Commons license: CC BY (attribution)
Taxonomic list
Leiosphaeridia asperata Naumova 1950 | |
unclassified | |
Coccogoneae | |
Gloeodiniopsis lamellosa Schopf 1968 | |
Hormogoneae | |
"Eomycetopsis robusta" = Siphonophycus robustum
"Eomycetopsis robusta" = Siphonophycus robustum Schopf 1968 |