The Eogene Yunlong Formation(Ey) of Jinding ore area is divisible into Ey~a, Ey~b and Ey~c, in which the Eyb and Ey~c are the ore-bea-ring horizons 380m thick and overlaid by a set of allochthonous(overthrus-ting) Mesozoic strata.

• 金顶矿区下第三系云龙组(Ey)可分为E_(y~a)、E_(y~b)、E_(y~c),其中E_(y~b)、E_(y~c)为含矿地层·厚约380米。 含矿地层之上为一套外来的(推覆)中生代地层。