...writer, in which large crystals of calcite are partly covered with smaller crystals of quartz. — AHW is subsequent in formation to the quartz. The calcite crystals are worthy of special crystallographic study. The occurrence of pyrites shows that in some cases its formation was simultaneous...

...writer, in which large crystals of calcite are partly covered with smaller crystals of quartz. — AHW is subsequent in formation to the quartz. The calcite crystals are worthy of special crystallographic study. The occurrence of pyrites shows that in some cases its formation was simultaneous...

...in the same geude, have I found the quartz resting on calcite*; they all indicate that the calcite is subsequent in formation to the quartz. The calcite crystals are worthy of special crystallographic study, The occurrence of pyrites shows that in some cases its formation was simultaneous...

...occur in the same geode have I found the quart/ resting on calcite; they all indicate that the calcite is subsequent in formation to the quartz. The calcite...that in some cases its formation was simultaneous witli that of calcite, while iu other instances it was apparently subsequent to it. The elongated crystals...

...subsequent in formation to the quartz. The ealcite crystals are worthy of special cr\ stallographic study. The occurrence of pyrites shows that in some...formation was simultaneous with that of calcite, while iu other instances it was apparently subsequent to it. The elougated crystals of tarnished pyrites...