【摘要】 作者在第四系普遍厚达20—40米的桠溪港凹陷内,在旧县至强埠一带多处发现始新世地层露头,从凹陷发育特征说明上述现象不能用原始盆地内部差异沉降解释,而是由于新构造运动所致,这与微地貌及现代形变资料也相一致。更多还原

【Abstract】 Several outerops of Eocene strata have been found along Jiouxian and Qianpu.They occur in Yaxi port Depression where the Quaternary system is commonly 20—40 meters thick.From the developing feature of the Depression it cannot be explained as the differential depressing inside the original basin.This is due to the neotectonic movement in accord with the micro-geomorphology and data of modern deformation.更多还原