古重
古重-
据砾石统计、薄片分析、古生物鉴定、古流分析及重矿物组合表明，大溪砾岩中砾石主要来自龙门山区的泥盆系&三叠系，填隙物中的石英碎屑可能主要来自杂岩体。
The pebbles of Daxi conglomerate are derived from Devonian-Triassic in Longmen mountains and quartz in the matrix mostly from complex , according to the statistics for pebbles , thin section , identification for fossils and measurement at palaeocurrents as well as heavy mineral association .