24.04.2013 Views

Arkell.1956.Jurassic..

Arkell.1956.Jurassic..

Arkell.1956.Jurassic..

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

RUSSIA AND THE EUROPEAN ARCTIC<br />

fragment of Q. holtedahli Salfeld & Frebold, 1924, pi. i, figs. 3, 4, type from<br />

Novaya Zemlya). Q. lamberti was collected in King Charles Islands.<br />

LOWER CALLOVIAN AND UNDATED<br />

Possibly part of the 40 m. of unfossiliferous shales and sandstones resting<br />

on the Trias at Festungsprofil is represented by shales in Ice Fiord and at<br />

South Cape which have yielded Kepplerites (Seymourites) tychonis Ravn,<br />

K. (S.) svalbardensis Bodyl. and Cadoceras cf. crassum Mads. (Frebold,<br />

1929, pi. ii, 1930, pi. vii, fig. 1; Sokolov & Bodylevsky, 1931, pi. v, figs.<br />

1, 2), correlating approximately with the Koenigi Zone. On King Charles<br />

Islands earlier Lower Callovian is represented by Arctocephalites arcticus<br />

(Newton) (Frebold, 1951, p. 79).<br />

? BATHONIAN<br />

In King Charles Islands the earliest fossiliferous Jurassic, following<br />

a thick sandy series, consists of some shaly sandstones containing a pelecypod<br />

assemblage which includes such typical Great Oolite forms as<br />

Meleagrinella echinata (Smith), M. braamburiensis (Phil.), Pteroperna<br />

emarginata Morris & Lycett and Lima cf. semicircular is Goldf. On the<br />

strength of this faunule Pompeckj (1899a) assigned the beds to the<br />

Bathonian.<br />

No other Bathonian occurs in the Spitsbergen area nor in Franz Joseph<br />

Land. It must be emphasized that the placing of the Arctocephalites<br />

beds in the Bathonian by Spath did not result from 'revision of the<br />

ammonites' (Frebold, 1951, p. 79), but was simply a matter of nomenclature,<br />

Spath having unfortunately decided to classify the basal Callovian<br />

Macrocephalus Zone in the Bathonian. No Bathonian ammonites are<br />

known from the Arctic.<br />

TOARCIAN<br />

In several areas (not Festungsprofil) the base of the Jurassic is formed<br />

by a phosphatic conglomerate, containing Upper and Middle Toarcian<br />

ammonites: Pseudolioceras compactile (Simpson), 'Coeloceras' polare Frebold,<br />

Dactylioceras annuliferum (Simpson), Grammoceras cf. saemanni<br />

(Dumortier), with belemnites and pelecypods (Frebold, 1929, pi. i; 1930,<br />

pi. vi; Bodylevsky, 1929). This thin bed has a wide distribution and<br />

always rests on Trias. It is a condensed and possibly a remanie bed<br />

(Weir, 1933, p. 693).<br />

ANDOE ISLAND, LOFOTEN ISLANDS<br />

On the isle of Andoe in the Lofotens, off the north coast of Norway,<br />

about 10 sq. km. of the coastal flat is underlain by Jurassic and Cretaceous<br />

sediments. The beds are faulted down into the granitic basement in a<br />

way similar to the outliers in the Hebrides. They are almost completely<br />

concealed by Quaternary deposits and are known only from borings for<br />

coal. The total thickness is at least 510 m.<br />

http://jurassic.ru/

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!