Baths and batholiths

Deborah Painter (USA) “Look over there!” I exclaimed as I stood on the grounds of a manufacturing plant and stared across the tracks of the Atchison, Topeka and Santa Fe Railroad to the east of the plant. I was pointing at several mountains a few kilometres in the distance. “That mountain is glowing!” Standing alongside me was James, the plant’s maintenance supervisor. “I guess because I’ve seen this for the past 14 years, I don’t even pay attention anymore” was his reply. The mountain was not glowing due to any internal source but because exceptionally light toned granites captured and reflected rays of sun streaming from behind a December cloud cover (Fig. 1). Fig. 1. The mountain glowed in the shaft of light, as the sun peeked from behind a cloud. (Credits: Deborah Painter.) The mountains looked like this for most of that chilly day and the glow shifted from mountain to mountain (Fig. 2). Fig. 2. A remarkable combination of December light and greyish-white toned granites produced this day-long glow in the Bernasconi Hills. (Credits: Deborah Painter.) The granitic mountain cluster was in Perris, a city in Riverside County, California in the USA. I have had the good fortune to visit this county twice recently on two separate and unrelated trips a few years apart. And my friend, Mike Ramsey, had been with me on both trips to this same county. He was with me and a friend late in November when we visited another friend in nearby Moreno … Read More

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