苏浙皖接壤地区的砺山—江阴海堤存疑及其他

Some doubts about the Lishan-Jiangyin barrier on the borderland of Jiangsu Zhejiang and Anhui Provinces and others

苏浙皖接壤地区有许多好的二叠系界线部面，著名的长兴煤山界线候选层型部面就出露在这里(盛金章1983;Sheng et al.1994)。因为本区长兴组岩相多变。

On the borderland of Jiangsu, Zhejiang and Anhui provinces the Changhsing limestone facies was different from the Talung clastic facies along a line drawn from Yixingto Jiangyin during the latest Permian (Changhsingian). This difference was interpretedas owing to a Lishan-Jiangyin land barrier lying between Guangde and Jiangyin. Up tonow, within the limits of this land barrier a Changhsingian transitional facies, whichconsists of mudstones with limestone lens intercalations and which contains Palaeofusulinasp., Neogondolella subcarinata, N. deflecta, N. changxingensis and so on, is known to us.It is evident that during the Changhsingian the so-called Lishan-Jiangyin barrier did notexist in this region because the occurrence of Changhsingian sediments.