This rock was quarried on the Scottish island of Ailsa Craig for use in curling stones. Sodium content distinguishes the S and I types of this rock, which forms batholiths like Half-Dome. Unlike the similar (*) rhyolite, this rock is found under the Earth's surface, making up most of the Earth's continental plates. For 10 points, name this light-colored igneous rock, whose large quartz crystals ma
This rock was quarried on the Scottish island of Ailsa Craig for use in curling stones. Sodium content distinguishes the S and I types of this rock, which forms batholiths like Half-Dome. Unlike the similar (*) rhyolite, this rock is found under the Earth's surface, making up most of the Earth's continental plates. For 10 points, name this light-colored igneous rock, whose large quartz crystals make it a durable building alternative to marble.
This rock was quarried on the Scottish island of Ailsa Craig for use in curling stones.