- The
Holkerian is a sub-stage of the Viséan
stage of the
International Commission on
Stratigraphy (ICS)
geological timescale. It is one of five sub-stages...
-
Ravenstonedale Group Stratigraphic range:
Courceyan to
Holkerian substages of
Carboniferous Type
Group Sub-units
Raydale Dolomite, M****tt and
Penny Farm...
- chronostratigraphy, the
British sub-stage of the
Carboniferous period, the "
Holkerian"
derives its name from
Holker Hall. The land on
which the
house stands...
- area:
Knockcrushen Formation (wackestones,
packstones and mudstones; of
Holkerian age)
Derbyhaven Formation (packstones and
mudstones with some mudstones...
-
Border Group Stratigraphic range:
Chadian to
Holkerian substages of
Carboniferous Type
Group Sub-units Lyne and Fell
Sandstone formations, Kershopefoot...
- chronostratigraphy, the
British sub-stage of the
Carboniferous period, the '
Holkerian'
derives its name from
Holker Hall. ****bria
portal Listed buildings in...
- five substages. From
youngest to oldest,
these are:
Brigantian Asbian Holkerian Arundian Chadian (the
lower part of this
substage falls in the Tournaisian)...
- Cowside. The
underlying stone of the
valley floor is Cove
Limestone (
Holkerian), but at the
valley sides and tops, it
consists of
Gordale Limestone,...
- magnesium). This
subgroup was
deposited in
equatorial seas
largely during the
Holkerian (British regional)
substage of the Viséan
stage of the Carboniferous,...
- (Mississippian).
Lethiscus is
known from only a
single specimen from the
Holkerian Stage (Middle Viséan) of the
Early Carboniferous (Middle Mississippian)...
