The oolite beach of the lower Triassic Feixianguan Formation in eastern Sichuan basin developed in themargin of carbonate platform, and platform margins are always related to ocean trough.

 
  • 四川盆地東部下三疊統飛仙關(guān)組鮞灘主要發(fā)育在碳酸鹽巖臺緣帶上,而臺緣帶與海槽密切相關(guān),找到了海槽就意味著(zhù)找到了鮞灘。
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