The Idaho Springs Batholith
Pegmatitic intrusion of milky or white quartz and feldspar (orange) along the Chimney Gulch Trail. In contrast to granite, where the minerals cool in fine clusters evenly, the quartz and feldspar here cooled separately.
Pegmatitic intrusion of milky or white quartz and feldspar (orange) along the Chimney Gulch Trail. In contrast to granite, where the minerals cool in fine clusters evenly, the quartz and feldspar here cooled separately.