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HOLKERIAN

Holkerian

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

Holkerian

Holker Hall

Country house in Cumbria, England

chronostratigraphy, the British sub-stage of the Carboniferous period, the "Holkerian" derives its name from Holker Hall. The land on which the house stands

Holker Hall

Holker_Hall

Lethiscus

Extinct genus of tetrapodomorphs

(Mississippian). Lethiscus is known from only a single specimen from the Holkerian Stage (Middle Viséan) of the Early Carboniferous (Middle Mississippian)

Lethiscus

Lower Holker

Civil parish in Cumbria, England

chronostratigraphy, the British sub-stage of the Carboniferous period, the 'Holkerian' derives its name from Holker Hall. Cumbria portal Listed buildings in

Lower Holker

Lower_Holker

Viséan

Second stage of the Carboniferous

five substages. From youngest to oldest, these are: Brigantian Asbian Holkerian Arundian Chadian (the lower part of this substage falls in the Tournaisian)

Viséan

Great Scar Limestone Group

area: Knockcrushen Formation (wackestones, packstones and mudstones; of Holkerian age) Derbyhaven Formation (packstones and mudstones with some mudstones

Great Scar Limestone Group

Great_Scar_Limestone_Group

Angela Strank

Chief Scientist at BP

doctoral research investigated the foraminiferal stratigraphy of the Holkerian, Asbian and Brigantian stages of the British lower carboniferous and was

Angela Strank

Angela_Strank

Hunts Bay Oolite

magnesium). This subgroup was deposited in equatorial seas largely during the Holkerian (British regional) substage of the Viséan stage of the Carboniferous,

Hunts Bay Oolite

Hunts_Bay_Oolite

Cowside

Valley in North Yorkshire, England

Cowside. The underlying stone of the valley floor is Cove Limestone (Holkerian), but at the valley sides and tops, it consists of Gordale Limestone,

Cowside

Scaleber Force

Waterfall in North Yorkshire, England

of the South Craven Fault, exposing either Late Arundian stage, or the Holkerian stage of Viséan age limestone. The gorge and the steep-sided valley of

Scaleber Force

Scaleber_Force

Ravenstonedale Group

Ravenstonedale Group Stratigraphic range: Courceyan to Holkerian substages of Carboniferous Type Group Sub-units Raydale Dolomite, Marsett and Penny Farm

Ravenstonedale Group

Ravenstonedale_Group

Border Group

Geologic formation in Great Britain

Border Group Stratigraphic range: Chadian to Holkerian substages of Carboniferous Type Group Sub-units Lyne and Fell Sandstone formations, Kershopefoot

Border Group

Border_Group

Geology of Yorkshire Dales National Park

Danny Bridge Limestone Formation (Asbian) Garsdale Limestone Formation (Holkerian-Asbian) Fawes Wood Limestone Formation Ashfell Sandstone Formation Tom

Geology of Yorkshire Dales National Park

Geology_of_Yorkshire_Dales_National_Park

List of geochronologic names

1.5 443.7 ± 1.5 age Ordovician ICS Cwm Hirnant (Wales) Bancroft, 1933 Holkerian 339 337.5 age Carboniferous regional Ramsbotton, 1979 Holocene 11,800

List of geochronologic names

List_of_geochronologic_names

East Kirkton Quarry

Geological site in Scotland

estimate, up to 341 ± 3 million years old. This would place it into the Holkerian or Arundian substage (early-middle Viséan). East Kirkton is one of many

East Kirkton Quarry

East_Kirkton_Quarry

Geology of Anglesey

Overview of the geology of the isle of Anglesey, Wales

only. The basal beds of the Carboniferous succession on Anglesey are of Holkerian to Asbian age and are termed the Lligwy Sandstone Formation. These sandstones

Geology of Anglesey

Geology_of_Anglesey