“Diabasbrottet Quarry”的意思、由来-开放百科全书

词条

Diabasbrottet Quarry

释义

References

The Diabasbrottet Quarry ({{coord|58|21|32.2|N|12|30|08.6|E}}), located on Mt. Hunneberg, Västergötland, Sweden, is the location of the Global Boundary Stratotype Section and Point (GSSP) which marks the lower boundary of the Floian stage of the Lower Ordovician.

The lower boundary of the Floian is defined as the first appearance of Tetragraptus approximatus, a graptolite species. The rock section, dominated by shale, is unusually fossiliferous, including fossilized remains of graptolites, conodonts, and trilobites. It is highly compressed, and the Ordovician section is only 12 m thick.

The Floian stage is named after Flo Parish, a village 5 km to the southeast of the Diabasbrottet quarry.

It was selected over "The Ledge" in western Newfoundland in 2000 and ratified as the GSSP by the International Union of Geological Sciences in 2002.

References

{{cite web | url = http://www.quaternary.stratigraphy.org.uk/noticeboard/TheOrdovicianSystem.doc | title = The Ordovician System | format = DOC | accessdate = 2006-06-30}}
{{cite journal | last = Bergström | first = Stig M. | author2 = Anita Löfgren | author3 = Jörg Maletz | date = December 2004 | title = The GSSP of the Second (Upper) Stage of the Lower Ordovician Series: Diabasbrottet at Hunneberg, Province of Västergötland, Southwestern Sweden | journal = Episodes | issue = 274 | pages = 265–272 | url = http://www.episodes.org/backissues/274/265-272%20Bergstrom.pdf | format = PDF | accessdate = 2006-06-30 | deadurl = yes | archiveurl = https://web.archive.org/web/20070928122010/http://www.episodes.org/backissues/274/265-272%20Bergstrom.pdf | archivedate = 2007-09-28 | df = }}

4 : Geology of Sweden|Geography of Sweden|Stratigraphy of Europe|Västergötland

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。