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FIGURE 6
Common trace fossils from the Volkhovian (Dapingian) of the St. Petersburg region,
Russia. Scale bars
¼
1 cm. (A) Vertical section of the “Steklo” hardground (Zeliony Bed) with
Gas-
trochaenolites oelandicus
filled with glauconite grains, Putilovo quarry. (B)
G. oelandicus
penetrat-
ing carapaces of the trilobite
Megistaspis estonica
, Zeliony Bed, Kingisepp quarry. (C) Hardground
surface in the Zhelty Bed (Dikari unit) with grooves and openings of
Balanoglossites triadicus
(arrows) and
Trypanites
isp. on the ridges, Babino quarry. (D) Vertical section with the same hard-
ground as in C, revealing a complex
B. triadicus
ichnofabric, Babino quarry. (E) Vertical section
between the Krasnenky and Melkotsvet beds displaying a firm- to hardground with U- and Y-shaped
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