The walls of Louis Spaulding’s tunnel are a hundred million years old, and they glitter. Patches of quartz shine like milky glass, near scratchy outcroppings of a form of felspar called cleavelandite. Spaulding points out …
February 14, 1980
The walls of Louis Spaulding’s tunnel are a hundred million years old, and they glitter. Patches of quartz shine like milky glass, near scratchy outcroppings of a form of felspar called cleavelandite. Spaulding points out …