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3)
中國南方在二疊紀形成主要含煤地層。與中國北方比較，華南地區(qū)相對活動，又可區(qū)分為西部相對穩(wěn)定(揚子地臺)和東部相對活動(東南加里東褶皺帶)的兩部分，因此其內部存在基底分異、古地形分異及沉積相分異，使二疊紀含煤地層呈現多時期、多特征的面貌。上一頁 [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [30] [31] [32] [33] [34] [35] [36] [37] [38] [39] [40] [41] [42] [43] [44] [45] [46] [47] [48] [49] [50] [51] [52] [53] [54] [55] [56] [57] [58] [59] [60] [61] [62] [63] [64] [65] [66] [67] [68] [69] [70] [71] [72] [73] [74] 下一頁 |
