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气候转暖,冰川退却,气候转冷,冰川再度前进。这时,冰川常会冲毁前期堆积的冰积地貌。这种现象叫“冰碛冲断构造”。蛇头岭大姑期冰碛泥砾中见有数条冲断构造。
2014-05-11
Wu Lao Peak is a sandstone peak formed in the Nanhua Period (0.8 – 0.68 billion years ago). The sandstone solidified due to heat coming ....
2018-06-04
五老峰是由南华纪(距今8亿~6.8亿年间)砂岩构成。由于砂岩受断层热动力影响,普遍硅化,坚硬致密,又由于岩石的裂缝受到强烈的构造剥蚀,崩塌后,成为十分险峻的山峰。五个奇峰岩台并立,面对鄱阳湖,如同五个老人,故称五老峰。其壮美引得唐代诗人李白(公元701-762) ....
2014-11-03
A metamorphic conglomerate is a complex form of rock. The mineral, chemical and structural composition of the original rock, while ....
2015-01-22