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sediments    音标拼音: [s'ɛdəmənts]
n. 沉淀物

沈淀物


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  • Sediment - Wikipedia
    Sediments are most often transported by water (fluvial processes), but also wind (aeolian processes) and glaciers Beach sands and river channel deposits are examples of fluvial transport and deposition, though sediment also often settles out of slow-moving or standing water in lakes and oceans
  • GEOLOGIC HISTORY OF OKLAHOMA - University of Oklahoma
    Thick layers of sediments accumulated in shallow seas that covered large areas The sediments were later buried and lithified (hard-ened to rock) into marine shales, limestones, and sandstones over geologic time
  • Sediment - National Geographic Society
    Over millions of years, layers of sediment may build up and harden into sedimentary rock Some of the many forms of sedimentary rock include sandstone, rock salt, and coal Sandstone forms as sand hardens For centuries, sandstone has been mixed with sticky cement to form concrete
  • Sediments | US EPA
    This page introduces the sediments module, when to list sediments as a candidate cause, ways to measure sediments, simple and detailed conceptual diagrams for sediments, sediments module references and literature reviews
  • Where Does Sediment Come From? The Many Sources
    Sediment comes from more places than just eroding rocks Learn about the natural and human sources that shape Earth’s sediment supply
  • Sedimentary rock | Definition, Formation, Examples, Characteristics . . .
    Sedimentary rocks are the lithified equivalents of sediments They typically are produced by cementing, compacting, and otherwise solidifying preexisting unconsolidated sediments
  • What is a sediment? - The Institute for Environmental Research and . . .
    Sediments are invaluable archives of Earth’s past environments By analyzing the grain size, composition, sedimentary structures, and fossil content of sedimentary rocks, geologists can reconstruct ancient landscapes, determine the climate, and track changes in sea level
  • Microsoft Word - ch1. doc - MIT OpenCourseWare
    It constitutes something like 25% of all sediments in the continental crust The figure is much higher for most coarse-grained rocks, but very low in fine-grained rocks and carbonate rocks
  • 12. 1 Classifying Sediments – Introduction to Oceanography
    All regions of the seafloor contain some form of sediment, although there are many different types of sediments from a variety of sources, and the amount of accumulated sediment can vary greatly from place to place Globally, ocean sediments average about 1 km thick, but they can exceed 15 km thick in areas of high accumulation (Figure 12 1 1)
  • What are sedimentary rocks? | U. S. Geological Survey
    What are sedimentary rocks? Sedimentary rocks are formed from pre-existing rocks or pieces of once-living organisms They form from deposits that accumulate on the Earth's surface Sedimentary rocks often have distinctive layering or bedding





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