英语语法分析

A lot of radiolarian cherty is found in the T3-J1 strata in Eastern Heilongjiang Province during recent geological survey, although previous exploration was not targeted at these strata for oi.

在勘探工作中发现黑龙江东部晚三叠世—早侏罗世存在大量的放射虫硅质岩地层。