a fine-grained metamorphic rock formed by the action of heat on clay rocks
例句
As indicated by cast thin section and ESM study, solution pores developed mainly in hornfels and fracture systems come to be the next. 论述了溶蚀作用在深埋期进行，溶质来自生油岩的有机酸和碳酸，角岩中不稳定的铝硅酸盐和碳酸盐矿物是产生溶孔的物质基础。
The Hongniu Cu deposit in "Sanjiang Metallogenetic Zone" is occurred in the skarnization alteration zone in the margin of marble and the hornfels body. “三江成矿带”内的红牛铜矿,赋存于大理岩边部矽卡岩化蚀变带及角岩体中。
Keywords metasomatic rock Hornfels Thermal electromotive force valueAonaodaba; 交代岩;角岩;热电动势值;敖脑达坝;
