Where: Yukon, Canada (65.3° N, 141.0° W: paleocoordinates 0.0° N, 0.0° E)
• coordinate stated in text
• outcrop-level geographic resolution
When: Fifteenmile Group, Cryogenian (850.0 - 635.0 Ma)
Environment/lithology: lithified, concretionary, gray, calcareous, cherty/siliceous carbonate and lithified, argillaceous shale
• ~173 m of dark gray limestone rhythmite with interbedded shale and tabular clast debris flows. The mineralized microfossils are in early diagenetic black chert nodules from ~3 m
•of section near the top of this unit. These facies are interpreted as subtidal in a shallowing-upward sequence. The entire section is intruded by numerous NNW-trending mafic dikes
Size class: microfossils
Preservation: concretion, permineralized, original phosphate, original carbon
Collected by Phoebe Cohen, Francis Macdonald in 2007
Collection methods: bulk, chemical, peel or thin section,
Primary reference: P. A. Cohen and A. H. Knoll. 2012. Scale Microfossils from the mid Neoproterozoic Fifteenmile Group, Yukon. Journal of Paleontology 86(5):775-800 [P. Cohen/P. Cohen]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 138310: authorized by Phoebe Cohen, entered by Phoebe Cohen on 11.01.2013
Creative Commons license: CC BY (attribution)
Taxonomic list
Show authors, comments, and common names
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Thorakidictyon circireticulum, Thorakidictyon myriocanthum, Petasisquama laciniata, Petasisquama alta, Petasisquama petasus, Petasisquama versicorona, Quadrireticulum palmaspinosum, Quadrireticulum allisoniae, Circidentatus pistricis, Circidentatus variodentatus, Characodictyon skolopium, Ospercapatera awramikii, Hexacatillus allmonii, Paleoscutula convocationis, Paleoscutula serrata, Paleoscutula inornata, Archeoxybaphon polykeramoides, Archeoxybaphon serratacapacis, Archeoxybaphon serratapusillum, Paleomegasquama arctoa, Paleomegasquama coccolithoides, Circitorquis soccus, Paleohexadictyon myriotrematum, Paleohexadictyon alexandrae, Paleohexadictyon litosum
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| Invaginatibalteus depressus |
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| Invaginatibalteus dimorphus |
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| Patinisquama cirratomarginata |
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| Bicorniculum brochum |
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| Confinisquama fimbriata |
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| Paleocrassilimbus spinosus |
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| Hyaloxybaphon monokeramoides |
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| Altarmilla multistriata |
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| Radiocerniculum inornatum |
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| Aqualisquama centritubula |
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| Spinicerniculum tribulosum |
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| Paterasquama crassa |
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