论文部分内容阅读
根据钻孔、~(14)C测年和微体古生物等资料对辽宁滨岸海相地层的特征,各海相地层形成的时代,并对与海相地层相应的海侵、海退特征及岸线变化等进行了分析。自晚第四纪以来,在该区存在三个海相地层。第一海相地层埋藏深度为161.8～28.2m,形成于距今110000～70000a;第二海相地层埋藏深度为79.1～44.6m,形成于距今40000～25000a;第三海桐地层埋藏深度为10～40m,形成于冰后期的全新世。第一、二海相地层主要分布在下辽河平原地区,第三海相层分布广泛,在辽宁沿岸普遍可见。
Based on the characteristics of borehole, strata of ~ (14) C and microfacs paleontology, the characteristics of the marine strata in Liaoning coastal area and the age of formation of marine strata, and the characteristics of transgression and regression of marine strata corresponding to the marine strata Shoreline changes were analyzed. Since the late Quaternary there have been three marine formations in the area. The burial depth of the first marine strata is 161.8-28.2m, formed in 110000-7000a from the present; the burial depth of the second marine strata is 79.1-44.6m, formed within 40000-25000a; the depth of burial depth of the third P. fortunei is 10 ~ 40m, formed in the late Holocene. The first and second marine strata are mainly distributed in the lower Liaohe Plain. The third marine strata are widely distributed and generally seen along the coast of Liaoning.