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backwash ripple mark
释义
backwash ripple mark
backwash ripple mark
[
′bak‚wäsh ′rip·əl ‚märk
]
(geology)
Ripple marks that are broad and flat and parallel to the shoreline, with narrow, shallow troughs and crests about 30 centimeters apart; formed by backwash above the maximum wave retreat level.
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s&sb
ssb
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ssb4
ssba
ssbaf
ssbag
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ssbam
ss-band
ssbb
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更新时间:2026/6/20 17:35:43