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Siberian Traps : ウィキペディア英語版 | Siberian Traps
The Siberian Traps ((ロシア語:''Сибирские траппы''), ) form a large region of volcanic rock, known as a large igneous province, in Siberia, Russia. The massive eruptive event which formed the traps, one of the largest known volcanic events of the last years of Earth's geological history, continued for a million years and spanned the Permian–Triassic boundary, about .〔〔 The term "traps" is derived from the Swedish word for stairs (, or sometimes ), referring to the step-like hills forming the landscape of the region, which is typical of flood basalts.〔(Trap ) at dictionary.reference.com〕 ==Geographical extent== Vast volumes of basaltic lava paved over a large expanse of primeval Siberia in a flood basalt event. Today the area covered is about —roughly equal to western Europe in land area—and estimates of the original coverage are as high as The original volume of lava is estimated to range from to The area covered lies between 50° and 75° north latitude and 60° to 120° east longitude.
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