Holsworthy Group
| Holsworthy Group Stratigraphic range: Namurian to Bolsovian (Carboniferous) | |
|---|---|
 Chevron folded alternations of sandstone and mudstone of the Crackington Formation, Warren Bay, Hartland Quay | |
| Type | Group |
| Unit of | Culm Supergroup |
| Sub-units | Crackington Formation, Bideford Formation, Bude Formation |
| Underlies | Exeter Group |
| Overlies | Teign Valley Group |
| Thickness | 3500 to 4000m |
| Lithology | |
| Primary | mudstones, |
| Other | siltstones, sandstones, conglomerates |
| Location | |
| Region | England |
| Country | United Kingdom |
| Extent | north and east Cornwall to north and east Devon |
| Type section | |
| Named for | Holsworthy |
The Holsworthy Group is a late Carboniferous lithostratigraphic group (a sequence of rock strata) in north and east Cornwall and Devon in southwest England. The name is derived from the Devon town of Holsworthy. The Group comprises (in ascending order i.e. oldest first) the Crackington, Bideford and Bude formations. In the Launceston area the group is represented by the Bealsmill Formation. It was formerly known as the Upper Culm Group.[1]
References
- ↑ http://www.bgs.ac.uk/Lexicon/lexicon.cfm?pub=HOWY (BGS on-line lexicon of rock units)
This article is issued from Wikipedia - version of the 3/14/2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.