North Yorkshire Geodiversity Partnership

Ingleton Quarry, Precambrian
Malham Cove Carboniferous
West Burton Falls Carboniferous
Cleave Dyke Quarry, Jurassic
Geology

Geology

Geological Sites

Geological Sites

Rocks for us

Rocks For Us

Geological Regions

Key fault systems such as the Dent, Craven and Stockdale separate the Project Area into major geological regions, blocks and basins, which over time have influenced the nature of the deposits. The Askrigg Block and Craven and Stainmore Basins are the most significant and the key deposits associated with them are illustrated on the cross-section. The following account outlines the major sequence of events on the Askrigg Block.

Above figure: Cross-section from the Craven Basin in the south, through the Askrigg Block and northwards to the Stainmore Basin, BGS (NERC) (after Aitkenhead et al. 2002 with additional information on new terminology from Colin Waters).

YDRP-Struc-Regions

Map: Geological regions (SLDH) South Lake District High, (SDF) Stockdale Fault, (DF) Dent Fault, (NCF) North Craven Fault, (MCF) Middle Craven Fault and (SCF) South Craven Fault.

YDRP-Bedrock-Hab-625

Map: The bedrock geology of the Yorkshire Dales and Craven Lowlands

PERIOD AGE ASKRIGG BLOCK GROUPS CRAVEN BASIN GROUPS EVENT
QUATERNARY Holocene Glacial and post glacial deposits Glacial and post glacial deposits Regional uplift and eastward tilting
Pleistocene
NEOGENE Pliocene Unconformity Unconformity
Miocene Basin inversion Alpine Orogeny
PALAEOGENE Oligocene Regional uplift
Eocene
Palaeocene
CRETACEOUS Upper Regional shelf subsidence
Lower
JURASSIC Upper Episodes of regional crustal extension
Middle
Lower
TRIASSIC Upper Dominantly extensional faulting in west
Middle
Lower
PERMIAN Upper Zechstein Group Dominantly regional subsidence in east
Lower Unconformity
Appleby Group ?
CARBONIFEROUS Stephanian Unconformity
Warwickshire Group? Basin inversion, regional uplift and erosion Variscan Orogeny
Westphalian Unconformity
Pennine Coal Measures Group Pennine Coal Measures Group Regional subsidence with minor extensional faulting
Namurian Millstone Grit Group Millstone Grit Group
Yoredale Group Craven Group
Visean
Great Scar Limestone Group Bowland High Group Major periods of extensional faulting and basin formation
Tournaisian Ravenstonedale Group
DEVONIAN Upper Upper Old Red Sandstone Group Unconformity Regional erosion
Middle Unconformity Acadian orogenic phase Caledonian Orogeny
Lower
SILURIAN Pridoli Windermere Supergroup Kendal Group Windermere Supergroup Kendal Group
Ludlow Foreland Basin Development
Coniston Group Coniston Group
Wenlock Tranearth Group Tranearth Group
Llandovery Stockdale Group Stockdale Group
ORDOVICIAN Ashgill Dent Group Dent Group Shelvian orogenic phase
Caradoc Unconformity Unconformity Subduction related arc magmatism
Llanvirn Basin development on Avalonia margin
Arenig
Tremadoc
CAMBRIAN Late
Middle
Early
PRECAMBRIAN Ingleton Group? Ingleton Group?