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YB地区长兴期生物礁具有独特的平面分布形状,呈倒“W”状。其独特的生物礁带平面分布形态揭示了多种因素共同作用的结果,主要是古地理和海平面的升降变化造成。长兴期生物礁带共分为9个礁期,其中高位期成因5个,海侵期成因4个,并与钻井资料分析的沉积旋回相对应,研究该区礁期对研究长兴期的海平面变化和古地理环境有积极意义。
Changbai reef in YB area has a unique planar distribution shape, which is inverted “W ” shape. Its unique bio-reef flat distribution pattern reveals the result of many factors, mainly caused by the change of paleogeography and sea level. The Changxing period reef is divided into 9 reefs, of which 5 are epoch-high and 4 are transcontinental. Corresponding to the sedimentary cycles of drilling data analysis, Changes and palaeogeography have positive significance.