Type Group Thickness up to 5000m | Underlies Millstone Grit Group Primary Mudstone, Limestone | |
Sub-units Hodder Mudstone, Hodderense Limestone, Pendleside Limestone, Bowland Shale formations Overlies Bowland High Group, Clwyd Limestone Group Other sandstone, siltstone, chert | ||
The Craven Group is a lithostratigraphical term referring to the succession of mudstone and limestone rock strata which occur in certain parts of northern and central England and northeast Wales in the United Kingdom within the Chadian to Yeadonian sub-Stages of the Carboniferous Period. Other lithologies including sandstones, siltstones and chert occur within the group.
The Craven Group unconformably overlies the Bowland High Group and elsewhere the Clwyd Limestone Group. It is succeeded (overlain) by the Millstone Grit Group
References
Craven Group Wikipedia(Text) CC BY-SA