Wedge structure is a common phenomenon in Qauternary strata. It has complicated origin and may provide a lot of environmental information.
楔状构造是第四纪地层中较常见的一种现象，其成因复杂，具有丰富的环境信息。
Strata thickness calculation is a routine work in office operation and geological analysis after field operations, while the traditional calculation may spend geologists a lot of time and strength.
岩层厚度的计算是野外地质工作内业整理和地质分析中的一项经常性工作，传统的工作方法往往要花费地质人员大量的时间和精力。
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。
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。
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