Most possibly, instead of warm-water carbonates, the invasion of cool climate might lead the accumulation of temperate carbonates in the region around the turn.
随着寒冷气候的侵入，代替暖水碳酸盐的最可能是该界面附近的温带碳酸盐的堆积。
2
Most stratabound lead and zinc deposits occurs in carbonates, in semi-closed sedimentary basin. They are of syngenetic origin.