地质遗迹是地质历史时期形成并遗留下来的珍贵自然遗产。
Geology remains are precious natural resources formed and remained in the geological history.
银矿是在一定的地质历史时期以及特定的地质环境中，受到一些重要的地质事件影响而形成的。
Silver deposits are formed by suffering some important geological events in a certain geological history period and special geological environment.
浅部地下水主要由现代区内降水补给形成，而深部地下水则可能由地质历史时期降水补给形成。
The shallow groundwater is mainly recharged by modern and local precipitation, and the deep groundwater might be originated from infiltration recharge of ancient precipitation.
地质历史时期古海洋气候环境的演变也是古海洋学研究中的一项重要内容，具有十分重要的意义。
The evolvement of climate environment in the geological history is one important contents ofthe paleoceanography research and has an important significance.
指出将地质历史时期的重大事件与天然气水合物产生的这些环境效应结合将成为今后的主要研究方向。
It will be the main research field how to combine the important events happened in geological history with these environmental effects of gas hydrate.
对凝缩段的识别不仅是认识层序结构的关键，而且对分析地质历史时期全球相对海平面变化至关重要。
Identification of condensed section is not only the key to understanding of sequence structure, but also critical to analysis of global relative sea level changes during geologic history.
现今不整合体系的形成与地质历史时期地层所受的风化、剥蚀和大气水淋滤作用及后期的水进沉积作用关系密切。
The present unconformity system is resulted from paleoweathering zone undergoing weathering, eluviations and transgression in geological age. The vertical texture existed in the both systems.
米兰柯维奇旋回在地质历史时期具有相对的稳定性，其在地层中的记录可以作为一座精确的“沉积物钟”和辅助的测龄工具。
The Milankovitch cycle, whose records in strata can be considered both as an accurate "sediment clock" and as an auxiliary dating tool, is relatively stable in the geologic history.
要认识和重建某个地质历史时期盆地的原始构造格局和沉积特征，就必须除去后期叠加的构造层和构造变形，即反序构造分析法。
Then use antitone structural analysis method to recognize and reconstruct the primary tectonic structure and sedimentary feature of a basin in certain geological history.
在这一漫长的地质历史时期（距今1800～800百万年），华北北部经历了多次升降运动，多次海陆变迁，逐渐由相对活动状态转变为相对稳定状态。
In this long geological period from 1800 to 800million years ago, the northern part of North China underwent many times, of up and down motion, many times of transformation from marine to contin…
陕北植被变迁在地质时期以及历史时期早期，主要由气候条件所控制，植被类型随气候的冷暖干湿变化而变迁。
During the early geological and historic stage, it was the climate that mainly influenced the change of the vegetation in the north of Shaanxi.
陕北植被变迁在地质时期以及历史时期早期，主要由气候条件所控制，植被类型随气候的冷暖干湿变化而变迁。
During the early geological and historic stage, it was the climate that mainly influenced the change of the vegetation in the north of Shaanxi.
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