| 词条 | Ancholme Group |
| 释义 |
| name = Ancholme Group | image = | caption = | type = Group | age = {{fossilrange|Callovian|Kimmeridgian|Callovian-Kimmeridgian}} | period = Late Jurassic | prilithology = Mudstone | otherlithology = Limestone, Marl | namedfor = | namedby = | region = England | country = United Kingdom | coordinates = | unitof = | subunits = Kellaways Formation, Oxford Clay, West Walton Formation, Ampthill Clay, Kimmeridge Clay | underlies = Portland Group | overlies = Great Oolite Group | thickness = 350m (in central/eastern Lincolnshire) | extent = | area = | map = | map_caption = }} The Ancholme Group is a geologic group in England. It preserves fossils dating back to the Jurassic period. It has previously been referred to as the Ancholme Clay Group. The group consists of predominantly grey, marine mudstone and silty mudstone with beds of argillaceous limestone nodules.[1] See also{{Portal|Earth sciences|England|Paleontology|Jurassic|Mesozoic}}
References1. ^{{Cite web|title = Ancholme Group|url = http://www.bgs.ac.uk/lexicon/lexicon.cfm?pub=AMG|website=bgs.ac.uk|accessdate = 2015-05-25|archiveurl = https://web.archive.org/web/20150525222755/http://www.bgs.ac.uk/lexicon/lexicon.cfm?pub=AMG|archivedate = 2015-05-25|publisher = British Geological Society}}
1 : Jurassic England |
| 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。