Titlebook: Geological History of the Polar Oceans: Arctic versus Antarctic; Ulrich Bleil,J?rn Thiede Book 1990 Kluwer Academic Publishers 1990 Arctic

凝結(jié)劑

歹徒

小平面

首創(chuàng)精神

The Geological History of Cenozoic Polar Oceans: Arctic Versus Antarctic — an Introductionegions (Frakes, 1979; Schwarzbach, 1974). During most of these ‘glacial’ episodes, plate tectonics — or was it pure coincidence? — placed a large and therefore elevated land mass (Hay ., 1981) at one or the other of the poles. These polar continents were subsequently covered by ice-sheets, the geolo

FLAIL

Debark

The Opening of the Arctic Oceanresent. At 180 Ma, most of the northern hemisphere consisted of one unbroken continental mass that stretched from the western margin of North America to the eastern margin of the Siberian Platform. With the Arctic Alaska/Chukotka Block closed against Arctic Canada, the western margin of Laurasia fro

Ccu106

LARK

驚呼