Microscopically the ores are medium grained to amorphous.

显微镜下，矿石为中粒至非晶质。

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Pores are closely correlated with sandstone fabric, and are more easily generated in medium grained sandstone where feldspar content is high(>37%) and cement content is low(carbonate<50%).

孔隙与砂岩组构密切相关，孔隙更容易产生于长石含量高（>37% ）、且胶结物含量低（碳酸盐<5 % ）的中粒砂岩中。

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Coarse-grained mustard has a grainy texture and a medium-hot fruity taste.

粗粒芥末有颗粒状纹理，并有中部热带水果的味道。

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