该铂-金砂矿产于超基性岩体山前谷地的第四纪冲积-洪积层中。
The studied platinum - gold placer occurs in Quaternary alluvial - diluvial a piedmont valley of ultrabasic rocks, Northwest China.
该海底古森林生长于全新世长乐组冲洪积层中，生长时代为距今约7000—7500 a，为湿热气候环境；
Ancient submarine forest grew in alluvial-pluvial deposit in Holocene Changle group, and the growing era is damp and hot climate environment as about 7000 ~ 7500 years ago;
该海底古森林生长于全新世长乐组冲洪积层中，生长时代为距今约7000—7500 a，为湿热气候环境；
Ancient submarine forest grew in alluvial-pluvial deposit in Holocene Changle group, and the growing era is damp and hot climate environment as about 7000 ~ 7500 years ago;
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