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 148719: authorized by Phoebe Cohen, entered by Phoebe Cohen on 25.07.2013, edited by Matthew Clapham
Creative Commons license: CC BY (attribution)
Taxonomic list
Archeoxybaphon serratacapacis Cohen and Knoll 2012
Paleohexadictyon myriotrematum Allison and Hilgert 1986
Paleohexadictyon litosum Allison and Hilgert 1986 | |
Hormogoneae | |
"Cephalophytarion majesticum" = Oscillatoriopsis majesticum, "Filiconstrictus diminutus" = Filiconstrictosus diminutus, Heliconema australiensis
"Cephalophytarion majesticum" = Oscillatoriopsis majesticum Allison 1989
"Filiconstrictus diminutus" = Filiconstrictosus diminutus Schopf and Blacic 1971
Heliconema australiensis Schopf 1968 | |
Myxococcoides minor | |
? Myxococcoides cf. minor Schopf 1968 | |
Myxococcoides | |
Myxococcoides cantabrigiensis Knoll 1982 | |
Glenobotrydion aenigmatis Schopf 1968
Fusilabellum brevistriatum Awramik 1989
Hyalocyrillium clardyi Allison 1989 | |
Radiocerniculum inornatum | |
Radiocerniculum inornatum Allison and Hilgert 1986 | |
Chlorococcaceae | |
Palaeoanacystis vulgaris Schopf 1968
Palaeoanacystis magna Awramik 1989 |