南岭一带花岗岩出露很广,过去因工作不精细,曾把这一带的未变质的花岗岩认为都属于燕山期花岗岩。笔者等1957年底在江西南部沿汽车路进行路线地质踏勘时,无意中在南康牛颈圩之南鹅公头的公路旁发现南康县龙回花岗岩岩基的南部与泥盆纪峡山砂岩底部成明显的沉积接触。情况如下:该层峡山砂岩 Nanling area exposed granite is very wide, in the past because of the work is not fine, once the unmetamisified granite that belong to the Yanshanian granite. The author at the end of 1957 in southern Jiangxi Province along the road route geological reconnaissance, inadvertently Nankang Niujie Wei South Goose male head of the road next to the discovery of Nankang Longhui granite basement and southern Devonian Gorge Sandstone The bottom of the obvious depositional contact. The situation is as follows: This layer of Xiashan sandstone