SL1 (VII). 3 (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)

• bed-level stratigraphic resolution

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.

Size class: macrofossils

Preservation: mold/impression

Primary reference: M. Zakrevskaya. 2014. Paleoecological reconstruction of the Ediacaran benthic macroscopic communities of the White Sea (Russia). Palaeogeography, Palaeoclimatology, Palaeoecology 410:27-38 [P. Wagner/P. Wagner]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 191890: authorized by Pete Wagner, entered by Pete Wagner on 19.02.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
 Bilateria -
Dickinsonia cf. tenuis, "Armilifera parva" = Armillifera
Dickinsonia cf. tenuis Glaessner and Wade 1966
"Armilifera parva" = Armillifera
Aspidella
  -
Aspidella sp.
Aspidella sp. Billings 1872
 Triradialomorpha -
Tribrachidium heraldicum
Tribrachidium heraldicum Glaessner 1959
 Bilaterialomorpha -
Temnoxa molliuscula, Parvancorina sagitta
Temnoxa molliuscula Ivantsov et al. 2004
 Kimberellomorpha -
Solza margarita, Kimberella quadrata
Solza margarita Ivantsov et al. 2004
Kimberella quadrata Glaessner and Wade 1966
Palaeophragmodictya
  -
Palaeophragmodictya spinosa
Cephalozoa
  -
Cyanorus singularis, "Onega stepanovi" = Cephalonega stepanovi
Cyanorus singularis Ivantsov 2004
"Onega stepanovi" = Cephalonega stepanovi Fedonkin 1977
Vendiamorpha
  -
Vendia rachiata
Vendia rachiata Ivantsov 2004