Where: Arkhangelsk, Russian Federation (64.4° N, 37.1° E: paleocoordinates 62.3° S, 19.7° E)
• coordinate estimated from map
• local area-level geographic resolution
When: White Sea other zone, Lamtsa Formation, Ediacaran (635.0 - 541.0 Ma)
Environment/lithology: prodelta; lithified shale and lithified sandstone
•maroon shale with thin (1–2 mm to 10 cm) graded beds of volcanic ash that can sometimes be traced for several dozens of kilometers within this facies. As the facies progrades, it incorporates gray, fine-grained, thin (15–30 cm) sandstone beds with sharply defined lower boundaries, wave-rippled lamination, and rippled tops.
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•This assemblage comprises packages (1.0–1.5 m) of gray and yellowishgray, fine-grained, thin-bedded sandstone units (0.1–0.5 m) interbedded with intervals (0.3–0.5 mup to 2 mthick) of graded siltstoneshale couplets and abundant gutter casts. The sandstone beds have sharp bases, fine upwards, and have rippled tops. Thinner beds tend to consist of fine horizontal laminations. Some of them contain gently curved laminasets which probably represent hummocky
•stratification. However, thicker units exhibit fining-upward textures, convoluted laminations, amalgamation surfaces, ball-and-pillow structure, isolated shale clasts, and wave ripple laminations.
Preservation: mold/impression
Primary reference: D. Grazhdankin. 2004. Patterns of distribution in the Ediacaran biotas: facies versus biogeography and evolution. Paleobiology 30(2):203-221 [M. Laflamme/M. Laflamme]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 91641: authorized by Marc Laflamme, entered by Marc Laflamme on 10.10.2009
Creative Commons license: CC BY (attribution)
Taxonomic list
Palaeopascichnus | |
Palaeopascichnus sp. Palij 1976 | |
Ediacaria | |
Ediacaria sp. Sprigg 1947 | |
Aspidella | |
Inaria | |
Inaria sp. Gehling 1988 | |
Dickinsonia sp. Sprigg 1947 |