Arkell.1956.Jurassic..

ELBURZ MOUNTAINS 37 1
could have come from the Zigzag Zone anywhere in Europe. The list
is as follows:—-
Oppelia (Oxycerites) fallax (Gueranger)
Oppelia (Oxycerites) limosa (Buckman)
Oppelia (Oxycerites) cf. radiatiformis Wetzel
Oppelia (Oxycerites) aff. waterhousei (M. & L.)
Oecotraustes densecostatus Lissajous
Lissoceras inflatum Wetzel
Morphoceras multiforme Arkell
Ebrayiceras pseudoanceps (Ebray)
Ebrayiceras jactatum Buckman
Cadomites deslongchampsi (d'Orb.)
Parkinsonia pachypleura Buckman
Parkinsonia aff. acris Wetzel
Parkinsonia dorni Arkell
Procerites cf. clausiprocerus Buckman
Procerites cf. funatus in Lissajous, 1923, pi. ix, fig. 2
Planisphinctes aff. planilobus Buckman
Planisphinctes cf. acurvatus (Wetzel)
Siemiradzkia berthae (Lissajous)
Siemiradzkia pseudo-rjazanensis (Lissajous)
Siemiradzkia cf. bajociformis Arkell
A few of these forms had already been recorded and figured from 67 miles
east of Teheran, in the valley of the Delitchai, by Erni (1931) and Riviere
(1932, 1934), and in addition Nannolytoceras pygmaeum (d'Orb.).
UPPER BAJOCIAN
According to Erni and Riviere the Bathonian ammonites at their locality
occur in a bed 20-28 m. above the base of the limestones, mixed with the
following forms which are Upper Bajocian: Oppelia cf. subradiata,
Oecotraustes cf. genicularis Waagen, Morphoceras dimorphum (d'Orb.),
and a small Normannites (Riviere, 1934, pi. vi, fig. 8). The bed seems to
be equivalent to beds 3 and 4 (and 5?) in the Julfa gorge (p. 365). There
was one Phylloceratid.
The section according to Erni is as follows:—
4c Thick series of Upper Jurassic limestones with chert, well bedded,
with intercalations of marl. Perisphinctes sp. Seen to 40 m.
\d. Shaly marl, 1 m.
\c. Grey hard limestone with beds of greenish-grey marl; fossils rare:
Perisphinctes and belemnites. c. 25 m.
46. Ammonite bed: grey, well-bedded limestone with intercalations of
marl, rich in fossils. (From this bed come the Upper Bajocian
and Bathonian ammonites.) c. 8 m.
\a. Grey marls with rare beds of limestone, c. 20 m.
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