Duba zuwa sashi na ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda sashi: Passage: gandun daji na polar sun kasance masu yawa. An samo burbushin halittu har ma da ragowar bishiyoyi kamar su cypress swamp da redwood dawn daga Eocene a Tsibirin Ellesmere a cikin Arctic. Ko da a wancan lokacin, Ellesmere Island ya kasance 'yan digiri ne kawai a cikin latitude na kudu fiye da yadda yake a yau. An kuma samo burbushin bishiyoyi da tsire-tsire na wurare masu zafi da na wurare masu zafi daga Eocene a Greenland da Alaska. Rainforests na wurare masu zafi sun girma har zuwa arewacin Arewacin Amurka da Turai. Tambaya: Ina tsibirin Ellesmere?
Yankin Arctic