Nature, Volume 84Sir Norman Lockyer Macmillan Journals Limited, 1910 |
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Página 334
... Pleistocene beds because they were not rocks , but only " drifts , " confused and troublesome things , hiding the real rocks , the orderly stratified formations ; the " basal complex because its schists and gneisses were fossil - less ...
... Pleistocene beds because they were not rocks , but only " drifts , " confused and troublesome things , hiding the real rocks , the orderly stratified formations ; the " basal complex because its schists and gneisses were fossil - less ...
Página 338
... Pleistocene , when its whole surface was scoured more than once by great glacial sheets . The mantle of decayed rock which must have accumulated during the long dry land stage was almost completely swept away , leaving the rounded ...
... Pleistocene , when its whole surface was scoured more than once by great glacial sheets . The mantle of decayed rock which must have accumulated during the long dry land stage was almost completely swept away , leaving the rounded ...
Página 339
... Pleistocene the shield seems to have remained dry land , and part of the Ordovician and Silurian capping of sediments was removed during this long period . The succession of Pleistocene ice - sheets completed the work of denudation ...
... Pleistocene the shield seems to have remained dry land , and part of the Ordovician and Silurian capping of sediments was removed during this long period . The succession of Pleistocene ice - sheets completed the work of denudation ...
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