Because they lack oxygen, marsh sediments are high in sulfides that are toxic to most plants.
由于它们缺乏氧气，沼泽沉积物中的硫化物含量很高，而硫化物对大多数植物都有毒。
The Holocene Epoch is characterized by different sediments, ones that form when the climate is warmer.
全新世时期的特征为不同的沉积物，它们在气候变暖时形成。
They say the fossils have been moved from their original resting places and redeposited in younger sediments.
他们说，这些化石已经从原来的安息地转移到更年轻的沉积物中。
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。
After millions of years, powerful geological forces, like underwater volcanoes lift up the ocean sediments to form new land.
数百万年后，强大的地质力量，比如海底火山，会掀起海洋沉积物，形成新的陆地。
The problem with ascribing all tillites to glaciation, however, is that tillite deposits are widespread in Precambrian sediments.
然而，使所有的黑土形成冰川作用的问题是，在前寒武纪沉积物中广泛分布有黑土。
The debate about megafauna pivots to a great degree on the techniques for dating old bones and the sediments in which they are buried.
关于巨型动物的争论在很大程度上取决于确定古老骨骼和埋藏它们的沉积物年代的技术。
In the normal water phase, the remaining Phosphorus makes its way, settles to the bottom of the ocean, and gets mixed into ocean sediments.
在正常的水相中，残留的磷会自己移动，沉淀到海洋底部，并混合到海洋沉积物中。
Several skeletons of another early whale, Basilosaurus, were found in sediments left by the Tethys Sea and now exposed in the Sahara desert.
在特提斯海留下的沉积物中发现了另一种早期鲸鱼龙王鲸的几具骨架，它们现在暴露在撒哈拉沙漠中。
As muddy sediments are pressed together, the gas and small droplets of oil may be squeezed out of the mud and may move into sandy layers nearby.
当泥质沉积物被挤压在一起时，气体和小油滴可能会从泥浆中被挤出，并进入附近的沙层。
Holocene sediments contain remnants of more recent plants and animals, so it's pretty easy to differentiate geologically between these two Epochs.
全新世的沉积物中含有较新的动植物遗迹，因此很容易从地质学上区分这两个时期。
Data from diverse sources, including geochemical evidence preserved in seafloor sediments, indicate that the Late Cretaceous climate was very mild.
来自不同来源的数据，包括保存在海底沉积物中的地球化学证据，都表明晚白垩世的气候非常温和。
Some very ancient sediments were no longer recognizable, having been converted to igneous and metamorphic rocks in the course of mountain building.
在造山的过程中，一些非常古老的沉积物已被转化为火成岩和变质岩，已经无法辨认了。
Data from diverse sources, including geochemical evidence preserved in seafloor sediments, indicate that the Late Cretaceous climate was milder than today's.
来自不同来源的数据，包括存留在海底沉积物中的地球化学依据，表明晚白垩纪的气候比如今的要温和。
Conditions that promote fossilization of soft-bodied animals include very rapid covering by sediments that create an environment that discourages decomposition.
促进软体动物石化的条件包括沉积物的迅速覆盖，以创造一个防止其分解的环境。
Later, between 1909 and 1915 sediments in Mammoth Cave that contained fossils were hauled out and examined in a chaotic manner that no scientist today would approve.
后来，在1909年到1915年之间，猛犸象洞穴里含有化石的沉积物被拖出，并以一种今天的科学家都不会同意的混乱的方式进行了检测。
The exposed rocks are attacked by the various weather processes and gradually broken down into fragments, which are then carried away and later deposited as sediments.
裸露的岩石受到各种天气过程的侵蚀，逐渐分解成碎片，然后被带走，最后沉积形成沉积物。
The fossils buried in Pleistocene and earlier ocean sediments were of foraminifera—small, single-celled marine organisms that secrete shells of calcium carbonate, or calcite.
在更新世和更早的海洋沉积物中埋藏的化石生物属于孔虫类生物，它们是微小的单细胞海洋生物，其分泌的硬壳由碳酸钙和方解石组成。
Scientists have dated sharp-edged flakes of stone found in the fine-grained sediments of a dry riverbed in the Afar region of Ethiopia to between 2.52 and 2.60 million years ago.
科学家们已经确定，在埃塞俄比亚阿法尔地区干燥河床的细颗粒沉积物中发现的具有锋利边缘的石片存在于252万至260万年前。
According to Davis' scheme, the shoreline is being extended in a seaward direction because of the "land-building" role of mangroves, which, by trapping sediments over time, extend the shore.
根据戴维斯的计划，由于红树林的“陆地建设”作用，随着时间的推移，通过捕获沉积物，海岸线向海的方向延伸。
Vintage ports must be decanted to remove natural sediments.
优质的葡萄酒必须倒出以清除其中自然沉淀的杂质。
Mangrove root systems have the ability to absorb and well trap sediments and pollutants in water that flows through them before they enter the ocean.
红树林根系有能力吸收并很好地截留水中的沉积物和污染物，这些沉积物和污染物在进入海洋之前流经这些根系。
The granite of the "Suhler Scholle " is capped with Permian sediments and igneous deposits.
苏勒·肖勒花岗岩上覆盖着二叠纪沉积物和火成岩。
Widely-separated sediments that occur between correlatable unconformities could be compared with each other.
可以将在相关不整合面之间出现的大范围沉积物相互比较。
She scooped out the yeasty sediments.
她将发酵的沉淀物舀了出来。
Dating sediments using ragweed and nuclear fallout.
利用豚草及核放射物对沉积物进行年代推定。
Gray and white materials within the lake bed are exposed sediments and salt crusts.
河床内部的灰色和白色物质显示出是沉积物和盐结层。
And, at this point, traces of industrialization can only be found in sediments in Europe.
而在这一点上，工业化的痕迹只在欧洲的沉积物中找到。
All that gas buoys up through the sediments and into the ocean, heating up the deep waters.
所有的这些气体穿过沉淀物浮向海洋，使深海海水温度升高。
Lava injected into deep sea sediments is baking sediments and driving out greenhouse gases.
深海下的极热熔岩会把海底有机沉积物烤干同时释放出温室气体。
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