1·The duration of previous geologic periods was difficult to determine.
以前很难确定地质期的持续时间。
2·Lyell's strategy for estimation of geologic dates was not very accurate.
莱尔估算地质年代的方法不是很准确。
3·Many scientists provided valuable research and input into the creation of the geologic time scale.
许多科学家为地质时间尺度的建立提供了有价值的研究和投入。
4·Three very large volcanoes are found on the Tharsis bulge, an enormous geologic area near Mars's equator.
在塔尔西斯高原上发现了三座非常大的火山。塔尔西斯高原是火星赤道附近一片广阔的地质区域。
5·Ocean sediments presented a much more complete geologic record of the Pleistocene than continental glacial deposits did.
相比于大陆冰川沉积物，海洋沉积物提供了更完整的更新世时期的地质记录。
6·As geologists, we examine layers of sediment on the Earth' s surface to approximate the dates of past geologic time periods.
作为地质学家，我们研究地球表面的沉积层以估算过去地质时期的年代。
7·Now, this apparent contradiction between geologic evidence and the stellar evolution model became known as the faint young Sun paradox.
现在，地质证据和恒星演化模型之间这种明显的矛盾被称为“微弱年轻太阳悖论”。
8·An objective of this particular cruise was to investigate the floor of the Mediterranean and to resolve questions about its geologic history.
这次特别巡航的目的之一是调查地中海的海床，并解决有关其地质历史的问题。
9·Today I want to talk about a way in which we are able to determine how old a piece of land, or some other geologic feature is—dating techniques.
今天我想谈谈一种使我们能够确定一块土地或其他一些地质特征的年代的方法——年代测定技术。
10·Attack by scavengers and bacteria, chemical decay, and destruction by erosion and other geologic agencies make the odds against preservation very high.
食腐动物和细菌的攻击、化学性腐烂，以及侵蚀和其他地质作用的破坏，导致无法保存的可能性非常大。
1·The duration of previous geologic periods was difficult to determine.
以前很难确定地质期的持续时间。
2·Lyell's strategy for estimation of geologic dates was not very accurate.
莱尔估算地质年代的方法不是很准确。
3·Three very large volcanoes are found on the Tharsis bulge, an enormous geologic area near Mars's equator.
在塔尔西斯高原上发现了三座非常大的火山。塔尔西斯高原是火星赤道附近一片广阔的地质区域。
4·Ocean sediments presented a much more complete geologic record of the Pleistocene than continental glacial deposits did.
相比于大陆冰川沉积物，海洋沉积物提供了更完整的更新世时期的地质记录。
5·As geologists, we examine layers of sediment on the Earth' s surface to approximate the dates of past geologic time periods.
作为地质学家，我们研究地球表面的沉积层以估算过去地质时期的年代。
1·If we have indeed entered a new epoch, then when exactly did it begin? When did human impacts rise to the level of geologic significance?
如果我们确实迈进了新的世，那么是什么时候开始的，什么时候人类的影响会达到地质学重要意义的程度？
2·Underwater methane releases have occurred in geologic history, sometimes as big burps of gas and sometimes as seeps lasting hundreds or thousands of years, Kessler said.
凯瑟勒表示，在地质学历史上水下的甲烷释放曾发生过，有时是喷发，有时是千万年地丝丝泄漏。
3·"It must have happened in a matter of weeks, " says Elrick. "What we see here is the death of a peat swamp, a moment in geologic time frozen by an accident of nature."
Elrick说：“当时的那场变故一定是在几周内发生的，我们现在所看到的这片泥炭沼泽遗迹，在地质学时间上只是大自然一次瞬间意外的快照。”
4·The metasomatic enrichments of Mesozoic mantles in the coastal Southeast China were inferred mainly by geochemical deduction, but reliable geologic evidence is lacking.
以往主要依据地球化学证据推断东南沿海中生代存在地幔富集作用，但缺乏可靠的地质学证据。
5·Topographical methods and geologic methods get the data about sedimentation rate spectrum with different ability for information and analysis.
据此，文章讨论了地形学方法和地质学方法在提取和分析沉积速率谱方面的潜力和局限。