Solza (Ediacaran of Russian Federation)

Where: Arkhangelsk, Russian Federation (64.4° N, 39.6° E: paleocoordinates 62.2° S, 21.9° E)

• coordinate estimated from map

When: White Sea other zone, Verkhovka Formation, Ediacaran (635.0 - 541.0 Ma)

Environment/lithology: prodelta; lithified sandstone and lithified shale

• This assemblage comprises greenish-gray, fine-grained, thin-bedded, crossbedded, and planar-laminated sandstones. The sandstones are channel fills that appear in lenses and laterally discontinuous packages (0.3–1.8 m thick and up to 10 m wide) with convex downward bases and nearly flat upper surfaces. These lenses occur on surfaces that are characterized by numerous sand-filled scour casts. Cross-bedded sandstone units tend to consist of multistoried cross-laminations. Individual sandstone beds (0.1–0.4 m) are another element of stratification. They record strong current influence and exhibit a variety of sole marks, including load casts, chevron, drag, and flute marks, current crescents, and gutter casts.

•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 m up to 2 m thick) 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 91644: authorized by Marc Laflamme, entered by Marc Laflamme on 10.10.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

Palaeopascichnus
  -
 Rangeomorpha - Charniidae
Charnia sp. Ford 1958
 Eumetazoa -
Parvancorina sp. Glaessner 1958
 Triradialomorpha -
Anfesta sp. Fedonkin 1984
Tribrachidium sp. Glaessner 1959
Albumares sp. Fedonkin 1976
 Kimberellomorpha -
Kimberella sp. Glaessner 1959
Vendiamorpha
  - Yorgiidae
Yorgia sp. Ivantsov 1999
Armillifera parva
  -
Armillifera parva Fedonkin 1980
Ediacaria
  -
Ediacaria sp. Sprigg 1947
Aspidella
  -
"Eoporpita sp." = Aspidella, "Cyclomedusa sp." = Aspidella
"Eoporpita sp." = Aspidella Billings 1872
"Cyclomedusa sp." = Aspidella Billings 1872
Mawsonites
  -
Mawsonites sp. Glaessner and Wade 1966
 Bilateria -
Dickinsonia sp. Sprigg 1947
Andiva sp. Fedonkin 2002