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Lias Group
The
Lias Group
or
Lias
is a
lithostratigraphic
unit (a sequence of
rock strata
) found in a large area of western Europe, including the
British Isles
, the
North Sea
, the
low countries
and the north of
Germany
. It consists of
marine
limestones
,
shales
,
marls
and
clays
.
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