形成混合沉积的条件是具备碳酸盐和硅质碎屑两类物源、活跃的水动力和干湿交替的气候，此外，海平面的相对波动也会造成积极的影响。

Occurrence of both carbonate and siliciclastic sources, active hydrodynamic regimes, alternate dry and wet climates, and the fluctuation of sea level are main factors for forming mixed sediments.

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本文提出渤海地区下第三系沙河街组湖泊成因的碳酸盐岩大都是陆源硅质碎屑和碳酸盐的混合岩。

This paper describes that the lacustrine carbonate of lower Tertiary Sha- hejie Formation in Bohai Bay is mostly terrigenous elastics-carbonate mixture rock.

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