蚀刻 发表于 2025-3-26 20:56:41
The Franco-Italian Alps and Canadian CordilleraMovements of the Earth’s crust leads, on the scale of geological time, to severe deformations which produce mountains in certain parts of the world. The most recent mountain ranges are on the border line between the continental masses and oceanic areas or between continental masses in places formerly occupied by oceans that have now disappeared.Implicit 发表于 2025-3-27 02:31:13
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Evolution of Minerals; Experimental Resultsand may be replaced by other minerals of different crystalline structure, often with a new distribution of chemical elements. However, within a given crystalline body, an exchange of ions may take place according to strict laws; this is termed ..HACK 发表于 2025-3-27 20:03:39
Basalts and Associated Rocksposits. Basalts may be extruded either from point sources or from deep intracontinenetal and intraoceanic fissures. In either case, they derive from the crystallization of a magma. Associated with other lavas, basalts from present or recent volcanic systems constitute suites with a distribution closParley 发表于 2025-3-28 00:41:57
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