kalk meaning in English

卡尔克
科尔克
石灰

Research section braided distributary channel sandstone is mostly positive rhythm , and high porosity and seepage rate in its central - top section , low seepage rate kalk interbed in its bottom . underwater distributary channel sandstone is relatively homogeneous positive rhythm , high porosity and seepage rate in its bottom , its top low . distributary mouth bar sandstone is complex rhythm , many interbeds inside
研究区宏观非均质性特点为：研究区辫状分流河道砂体以正韵律为主，高孔、渗带在砂体中上部，底部常存在低渗透率钙质夹层；水下分流河道砂体为较均质的正韵律，下部孔渗高，上部孔渗变小，分流河口坝砂体为复合韵律，砂体内部夹层多。