【摘要】 在金山深槽海区,涨潮的底层最大流速比落潮的大得多,地貌的塑造动力主要是流经大、小金山之间的中股涨潮流。槽底的深潭可能是由于下伏的晚更新世陆相地层岩性的不均匀性,在涨潮流的冲刷下形成的;北坡向岸伸展的叉槽是小金山北的北股落潮流冲刷成的。深槽东部的地貌特征可能受浅地层中错断的控制。更多还原

【Abstract】 Jinshan. Trough is in the middle inshore part of the Hang-zhou Bay and is formed by tidal scouring.The area is dominated by three tidal currents. The measured maximum speed of the flood current near sea floor greatly exceeds that of the ebb. The main factor of geomorphological construction is the flood current between the Dajinshan Isle and the Xiaojin-shan Isle. At the base of the trough have been found six pits,probably due to lithological heterogeneity of the underlying terrestrial deposits of Late Pleistocene age and scoured out by tidal currents. A branch of trough across its north slope landward is scoured by the ebb of the the north cur rent. The morphorlogical features of the eastern part of the trough are probably controlled by faulting in the upper substratum.更多还原