BGS Linked Open Data

Red Crag Formation

Red Crag Formation ['', '', ''] ['', '', '', ''] ['Rests unconformably on the Coralline Crag Formation, Palaeogene formations and Chalk Group bedrock.'] ['Onshore overlain unconformably by sands of the Norwich Crag Formation, which are less coarse-grained, better sorted, less shelly and generally paler in colour. \r\n\r\nOffshore overlain unconformably by early Pleistocene or Holocene sediments.'] [''] ['70 m maximum offshore (Flemish Bight Sheet). \r\n\r\nOnshore commonly to 20 m but thicker in coastal areas of east Norfolk and Suffolk and within the Stradbroke Trough, locally reaching c. 40 to 45 m.'] [''] ['Sand with subsidiary gravel and trace clay, gravelly sand and silt. Stratified bedrock. Occurs both onshore and offshore. Deposited during the Piacenzian Age (Neogene Period) - to - Thurnian Stage (Quaternary Period) (3.6-2.12 Ma BP).'] ['Red Crag Formation'] ['Red Crag Series [Obsolete: use RCG]', 'Red Crag Member [Obsolete: use RCG]', 'Lower Crag [Obsolete: use RCG]', 'Red Crag [Obsolete: use RCG]'] ['Red Crag Formation'] [''] ['stable'] ['2.12'] [''] ['RCG'] ['Coarse-grained, poorly sorted, cross-bedded, abundantly shelly sands (in East Anglia). Dark green and glauconitic when unoxidised, but typically oxidised to yellow or reddish brown with ferruginous concretions (iron pan). Basal bed of rounded flint pebbles. Offshore, fine- to medium-grained, muddy, calcareous, glauconitic sands. \r\n\r\nShallow marine deposit. \r\n\r\nPiacenzian (Waltonian) to Thurnian (MIS ?103 - 82).'] [''] [''] ['3.6']