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 148720: authorized by Phoebe Cohen, entered by Phoebe Cohen on 25.07.2013, edited by Matthew Clapham
Creative Commons license: CC BY (attribution)
Taxonomic list
"? Balbariniella praestans" = Balbiriniella praestans, Glenobotrydion aenigmatis
"? Balbariniella praestans" = Balbiriniella praestans Oehler 1978
Glenobotrydion aenigmatis Schopf 1968 | |
Myxococcoides minor | |
Myxococcoides cf. minor Schopf 1968 | |
Hormogoneae | |
Caudiculophycus sp. Schopf 1968 | |
Cyanonema inflatum, Palaeolyngbya barghoorniana, ? Obruchevella sp., Heliconema australiensis, ? Heliconema bulbosa, Oscillatoriopsis obtusa, "Cephalophytarion majesticum n. sp." = Oscillatoriopsis majesticum, "Filiconstrictus diminutus" = Filiconstrictosus diminutus
Cyanonema inflatum Oehler 1977
Palaeolyngbya barghoorniana Schopf 1968
? Obruchevella sp. Reitlinger 1948
Heliconema australiensis Schopf 1968
? Heliconema bulbosa Allison 1989
Oscillatoriopsis obtusa Schopf 1968
"Cephalophytarion majesticum n. sp." = Oscillatoriopsis majesticum Allison 1989
"Filiconstrictus diminutus" = Filiconstrictosus diminutus Schopf and Blacic 1971 | |
Coccogoneae | |
Sphaerophycus parvum Schopf 1968
Eosynechococcus sp. Hofmann 1976 | |
Altarmilla multistriata | |
Altarmilla multistriata Allison and Hilgert 1986 | |
Chlorococcaceae | |
Palaeoanacystis magna Awramik 1989
Palaeoanacystis vulgaris Schopf 1968 |