igneous phase 中文意思是什麼
igneous phase
解釋
火成期-
The first phase involves the formation of thrusting and napping towards nww accompanied by extensive igneous activity and mineralization. the second phase corresponds to the development of asymmetrical small fold downwards north and south. the final phase the cenozoic is marked by strong brittle fractures activity resulting in the sharp heave of the landform of xiaoqinling aera
太華群內的褶皺及南北兩側斷裂分析表明，小秦嶺燕山期至少經歷3期變形，第一期為sse nww向的褶皺變形作用；第2期為南北向正斷下滑剪切作用；第3期為脆性正斷作用。
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