Arkell.1956.Jurassic..

LOWER SAXONY 137
conglomerate and dolomitic limestone or dolomitic sandstone. Outside
the Hils basin the thickness is much less, and in the Teutoburger Wald
and near the Dutch frontier the formation is absent.
The fauna of the Einbeckhausen Plattenkalk consists of a few species
of small pelecypods and gastropods of no dating value, and some fish
and plant remains. They indicate a marine or brackish environment,
but the freshwater Valvata helicoides is also recorded (Koert, 1898, p. 13).
FIG. 16.—Map of the principal Jurassic outcrops in Lower Saxony.
(Einbeckhausen is a small place south-west of Hanover, in the Deister-
Siintel area; not to be confused with Einbeck in the Leine valley near
Northeim.)
MIDDLE KIMERIDGIAN (up to 100 m.)
Gigasschichten, or 'Portlandkalk' (average 60-80 m. in the Hils basin,
rising locally to 90-100 m., but elsewhere much thinner). A series of
limestones and marls, with conglomerates of rolled Jurassic limestones at
the base and locally at higher levels. At Volksen on the Deister it consists
of a single bed of coarse conglomerate up to 3 m. thick (plate 8b), resting
disconformably on basal Kimeridgian limestone and on Upper Oxfordian
http://jurassic.ru/