| 词条 | Teign Valley Group |
| 释义 |
| name = Teign Valley Group | image = Folds at Penally Point near Boscastle in Cornwall - geograph 3067867.jpg | caption = Folded slate at Penally Point near Boscastle in Cornwall, England | type = Group | age = Famennian (Devonian) to Marsdenian (Carboniferous) | period = Paleozoic | prilithology = mudstones, | otherlithology = cherts, sandstones, limestones, basaltic lavas, tuffs | namedfor = valley of River Teign | namedby = | region = England | country = United Kingdom | coordinates = | unitof = Culm Supergroup | subunits = Barras Nose Formation, Trambley Cove Formation, Teign Chert Formation, Dowhills Mudstone Formation, Boscastle Formation | underlies = Holsworthy Group | overlies = Exmoor Group | thickness = 100 to 720m | extent = north Cornwall through Devon to west Somerset | area = | map = | map_caption = }} The Teign Valley Group is a late Devonian to late/middle Carboniferous lithostratigraphic group (a sequence of rock strata) in north Cornwall through Devon and into west Somerset in southwest England. The name is derived from the valley of the River Teign. The Group comprises (in ascending order i.e. oldest first) the Barras Nose, Trambley Cove, Teign Chert and Dowhills Mudstone formations. It was formerly known as the Lower Culm Group or Lower Culm Measures.[1] References1. ^http://www.bgs.ac.uk/Lexicon/lexicon.cfm?pub=TEVY (BGS on-line lexicon of rock units) 4 : Carboniferous System of Europe|Devonian System of Europe|Geology of England|Geological groups |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。