“An exception is a gold lode discovered about 1930 near Sleitat Mountain where about $200 in gold was recovered from small quartz veins near the periphery of a small granitic intrusive body.”

“The mine is well known for the rare secondary copper minerals that occur in the lode, including paramelaconite, cuprite, malachite, and dioptase.”

“By 1952 an improved grade of ore was encountered, and the lode was mined until 1956, when ore reserves were exhausted.”

“Copper also filled voids and occurred in thin fissure veins that cut the lodes.”

“Porcelaneous datolite occurred in the amygdaloidal lodes as veins, vesicle filling, and nodules.”

“It can be found in fissure veins and brecciated amygdaloidal basalt lodes but not in the conglomerate lodes.”