Late Ordovician shelly faunas occur at several localities in the(O|¨)stersund area of J(a|¨)mtland,central Sweden,an area that today is included in the Lower Allochton of the Swedish Caledonides.The Late Ord...Late Ordovician shelly faunas occur at several localities in the(O|¨)stersund area of J(a|¨)mtland,central Sweden,an area that today is included in the Lower Allochton of the Swedish Caledonides.The Late Ordovician faunas of J(a|¨)mtland have developed against a background of intense and rapid global climate change.The faunas are present approximately in the middle of the Kyrk(?)s Quartzite in the east and occur in the uppermost Kogsta Siltstone in the west. Changes in faunas and depositional environments provide regional evidence of these global cooling and regressive events.The faunas occur in shale and siltstone facies and are used to effect展开更多
文摘Late Ordovician shelly faunas occur at several localities in the(O|¨)stersund area of J(a|¨)mtland,central Sweden,an area that today is included in the Lower Allochton of the Swedish Caledonides.The Late Ordovician faunas of J(a|¨)mtland have developed against a background of intense and rapid global climate change.The faunas are present approximately in the middle of the Kyrk(?)s Quartzite in the east and occur in the uppermost Kogsta Siltstone in the west. Changes in faunas and depositional environments provide regional evidence of these global cooling and regressive events.The faunas occur in shale and siltstone facies and are used to effect
