...more extensive in some beds than in others. Finally, the immense lenses of cupriferous pyrite, e, g., those in the Highland Boy, exhibit the same massive...transition from the rich bands to barren wall rock is well defined. On the contrary, it is gradual, passing from the bed of rich copper sulphide through lean...

...appears to indicate a selective tendency on the part of mineral in solution for more soluble beds. This selective action leads to a very irregular periphery. The transition from massive, solid ore is not sharp, but gradual, passing from rich copper sulphide through lean copper-ore, still poorer...

...extensive in some beds than in others. Finally, the immense lenses of cupriferous pyrite, that is, those in the Highland Boy, exhibit the same massive...transition from the rich bands to barren wall rock is well defined. On the contrary, it is gradual, passing from the bed of rich copper sulphide through lean...

...Further, the marked deposition of ore along certain beds, and the slight deposition along others, appear to indicate a selective tendency on the part of mineral...transition from the rich bands to barren wall rock is well defined. On the contrary, it is gradual, passing from the bed of rich copper sulphidethrough lean copper...

...Similarly, in small shoots the massive structure is a bedding of massive ore which is more extensive hi some beds than in others. Finally, the immense lenses...transition from the rich bands to barren wall rock is well defined. On the contrary, it is gradual, passing from the bed of rich copper sulphide through lean...