Late Ordovician shelly faunas from Jämtland: palaeocommunity development along the margin of the Swedish Caledonides

Bulletin of geosciences

Harper DAT¹  Dahlqvist P¹  Wickström L¹ 

关键词: brachiopods;    Hirnantia fauna;    Hirnantian;    Jämtland;    Late Ordovician;    Caledonides;    palaeocommunity;   

DOI  :  

来源: Czech Geological Survey

【 摘 要 】

LateOrdovicianshellyfaunasoccuratseverallocalitiesintheÖstersundareaofJämtland(Sweden)anddevelopedagainstabackgroundofintenseandrapidglobalclimatechange.Intheeasternpart,approximatelyinthemiddlepartsoftheKyrkasQuartzite,andinthewesternpartintheuppermostKogstaSiltstonechangesinfaunasandsedimentarypatternsprovideregionalevidenceoftheseglobalevents.Inbothareasthefaunasoccurinshaleandsiltstonefaciesandareusedtoeffectcorrelationsbetweentheeasternandwesternpartsoftheregion,whichshowmajordifferencesinfaciesdevelopment.Thesesub-basins,situatedonthemarginsofadevelopingmountainbelt,reacteddifferentlytoglobalsignalsprovidingfurtherevidenceoftheheterogeneousresponsestoclimatechangeattheendoftheOrdovicianPeriod.

【 授权许可】

Unknown