Arkell.1956.Jurassic..

5°o
RUSSIA AND THE EUROPEAN ARCTIC
NOVAYA ZEMLYA
No Mesozoic beds have been found in situ in Novaya Zemlya and it is
doubtful whether any exist: the general structure is a complex Palaeozoic
anticlinorium, deeply eroded after the Variscan orogeny. A number of
well-preserved ammonites have been found in gravels, however, mainly
in the middle part of the west coast, and have been figured by Sokolov
(1913) and Salfeld & Frebold (1924); see also list in Bodylevsky (1936),
FIG. 79.—Sketch-map of the European Arctic and adjacent regions, showing the
present edge of the continental shelf (hachured).
and detailed treatment by Frebold (1930; 1951, p. 81). They range in
age from Cranocephalites pompeckji (Madsen) which is probably basal
Lower Callovian to Tollia spp. and Polyptychites spp. of the Valanginian.
Lower, Middle and Upper Callovian are represented by Arctocephalites
arcticus, Cadoceras tschefkini and Longaeviceras keyserlingi respectively,
and the Bimammatum Zone by Amoeboceras regulare Spath and frequens
Spath; all as in Petchoraland and Spitsbergen. The supposed Upper
Volgian with Craspedites cf. fragilis (Traut.) and C. aff. jugensis Prig,
is probably Lower Cretaceous (Subcraspedites fauna). No ammonites of
the Kimeridgian or Lower Volgian have been found.
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