Sediment above and below the gypsum layer contained tiny marine fossils, indicating open-ocean conditions.
在石膏层上方和下方的沉积物中含有许多小型海洋生物化石，这表明这里的海洋环境很开放。
They found a unique layer of sediment worldwide.
他们在世界各地发现了一层独特的沉积物。
An iridium-enriched sediment layer and a large impact crater in the Yucatn provide evidence that a large meteorite struck Earth about 65 million years ago.
尤卡坦半岛上富含铱的沉积层和一个巨大的陨石坑提供了证据，证明了约6500万年前，一颗大型陨石撞击了地球。
This sediment layer is enriched in the rare metal iridium and other elements that are relatively abundant in a meteorite but very rare in the crust of Earth.
这一沉积层富含稀有金属铱，以及其他在陨石中较丰富而在地壳中十分罕见的元素。
The explosion lifted about 100 trillion tons of dust into the atmosphere, as can be determined by measuring the thickness of the sediment layer formed when this dust settled to the surface.
这次爆炸将大约100万亿吨的尘埃提升到大气中，这一数字可以通过测量这些尘埃降落到地表时所形成的沉积层的厚度来确定。
Scientists first identified this impact in 1980 from the worldwide layer of sediment deposited from the dust cloud that enveloped the planet after the impact.
1980年，科学家首次在从尘云中沉淀下来的全球范围的沉积层中识别出这种撞击，这些尘云在撞击后围绕着地球。
The technique measures light energy trapped in sediment grains surrounding the tools from the last time the layer was exposed to sunlight.
这种技术可以测量工具周围的沉积层最后一次曝露于阳光后储存下来的光能，由此判断出时间。
They were especially interested in a 30-ft. layer of sediment just above the iridium layer.
他们对30英尺深度略高于铱层的一个沉积层特别感兴趣。
Sediment cores are essentially a record of sediments that settled at the sea floor, layer by layer, and they record the conditions of the ocean system during the time they settled.
沉积物岩心主要记录的是沉淀在海底沉积物，一层又一层，记录它们沉淀时的海洋系统状况。
Once a wave breaks, a shallow layer of water glides along the shore, carrying sediment with it.
一旦断裂，一层浅浅的水携带着泥沙滑向海岸。
Is also often found on the continental shelf shell layer, and many shells were crushed after the stacked together to form the uneven thickness of the sediment layer.
在大陆架上还能经常发现贝壳层，许多贝壳被压碎后堆积在一起，形成厚度不均的沉积层。
Sediment above and below the gypsum layer contained tiny marine fossils , indicating open -ocean conditions .
在石膏层上下的沉积物中包含了微小的海洋生物…
But the theory about the flow regime of the wave boundary layer, the wave friction factor, the bed shear stress and the initiation of sediment motion has not developed very well.
而且波浪是海岸地区一个非常重要的海洋水动力因素，波浪作用下底部边界层的流态、底摩阻系数、床面剪应力和泥沙起动的理论还不成熟。
The flow with sediment trapped by the slit of the vortex tube can form vortex inside the tube and exclude efficiently the coarse sediment near the bed layer in front of the tube.
进入涡管槽口的挟沙水流会形成强有力的螺旋流沿涡管流动，能有效地排除底部推移质泥沙。
The first layer was the latest flood sediment, i. e. the sediment of the heavy flood in 2003.
研究剖面最上层为最新洪水沉积，即2003年大洪水所形成的沉积。
Objective:To purify bacterium protein made up of many compositions whose molecular weights are little difference. Methods:results of using sediment and layer-division are not satisfying.
对于含有多种成分且各蛋白质成分的分子量相差较小的菌体蛋白质的提纯，用一般的沉淀法、层析法均达不到理想效果。
The sediment cores from "Cattle Pond" on Dongdao Island of South China Sea contain a coral sand sediment layer embedded by ornithogenic sediments with sharp stratigraphic contacts.
在南海东岛牛塘海鸟粪土沉积层中发现一岩性明显不同于上、下层位的珊瑚砂夹层。
Through the roles of interception and absorption of the canopy layer, litter layer, and root and soil layer, the benefits of flood and sediment reduction of forest vegetation are prominent.
森林植被通过林冠层、枯落物层和根系土壤层的分层拦截吸收，起到突出的减洪减沙作用。
The channel sedimentation comes from three parts, i. e. the suspended sediment, high sediment layer, and bed load.
航道淤积由三部分构成：悬沙、推移质和底部高浓度含沙层。
The measured data show that the bedload sediment transport rate is related more closely to the effective stream power within the bed-surface layer than to the river stream power.
实测资料表明，推移质输沙率与床面层内有效水流功率有良好的相关性，且高于推移质输沙率与水流功率的相关性。
The infiltration, transportation and transformation of a main contaminant (ammonia nitrogen) in the Taihu Lake sediment through a clayey soil layer are studied experimentally.
对太湖疏浚污染底泥中含有的一种主要污染物——氨氮在底泥堆场黏土防渗层中的渗透和运移规律进行了试验研究。
The spatial distribution of the concentrations of COD in water and sediment of surface layer shows a decreasing trend from the northwest and middle waters to the estuary of the bay.
海水与表层沉积物COD含量平面分布总的呈西北部水域和湾中部水域向湾口降低的趋势。
Meanwhile, shaking closer to the epicenter was made worse by a thick layer of sediment deposited in the Sichuan Basin by the Yangtze River, which makes the ground there unstable.
与此同时，在距离震中较近的地区，由于长江在四川盆地形成了厚厚的沉积层，地质结构不稳定，震动更为严重。
Use a trowel, collect the top layer of the sediment. Place the sediment in a sieve and STIR it gently in the water.
用小铲把河床表面的物质铲到金属筛里，将金属筛在水中轻轻转动。
Use a trowel, collect the top layer of the sediment. Place the sediment in a sieve and STIR it gently in the water.
用小铲把河床表面的物质铲到金属筛里，将金属筛在水中轻轻转动。
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