溆浦砂锡矿床赋存在第四系冲积层中锡石主要富集在底部砂砾石层。
Placer tin deposit in xupu occurs in alluvial sediment of quatemary system and cassiterite chiefly concentrates at the bottom of gravel layers.
溆浦砂锡矿床赋存在第四系冲积层中，锡石主要富集在底部砂砾石层。
Placer tin deposit in Xupu occurs in alluvial sediment of Quatemary SyStem and CaSSiterite chiefly concentrates at the bottom of Gravel layers.
盆地西缘距蚀源区近，坡度陡，形成了重力流成因的砾石质水下冲积扇。
The western margin of the basin was close to the source regions and very steep, so that pebbly subaquatic alluvial fans were formed that were deposited from a gravity flow.
采用粒度分析、岩石岩性分析、砾石统计等方法，本文认为新疆叶城地区第四纪粗砂砾层为冲积-洪积类型。
A series of Quaternary sands and gravels are well distributed on the northern foot of West Kunlun Mountains in Yecheng area oi' Xinjiang.
采用粒度分析、岩石岩性分析、砾石统计等方法，本文认为新疆叶城地区第四纪粗砂砾层为冲积-洪积类型。
A series of Quaternary sands and gravels are well distributed on the northern foot of West Kunlun Mountains in Yecheng area oi' Xinjiang.
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