庐(江)枞(阳)火山沉陷,位于长江中下游沿江火山岩带的中部。该区概略地质填图(图1)表明,这一长达45公里、宽约40公里的盆状火山沉陷,实际上是一个经历了两次喷发—沉陷—复活隆起旋回的复合型沉陷构造。火山活动发生于晚侏罗世至早白垩世,并可划分为盘石岭、塔猫尖、孙家畈、双庙及浮山五个喷发旋回。强烈的复活 Lu (Jiang) fir (Yang) volcano subsidence, located in the middle and lower reaches of the Yangtze River volcanic belt in the middle. The geologic mapping of the area (Figure 1) shows that the basin-shaped volcanic subsidence of 45 km long and 40 km wide is actually a composite subsidence structure that has undergone two eruptions - subsidence - reactivation uplift. Volcanic activity took place in the Late Jurassic to Early Cretaceous and can be divided into five eruption cycles: Pan Shiling, Tacoma, Sunjiawan, Shuangmiao and Fushan. Strong resurrection