Knippa, TX, United States
Knippa Trap Rock Plant. Volcanic lava deposited here more than 60 million years ago cooled and hardened over time to form basalt, a dark igneous rock also known as trap rock. M. B. (Pete) Walcott purchased acreage here about 1904 and in 1907 formed the Genevieve Mining Co. to search for gold. Althou
gh little gold was found, substantial quantities of high quality trap rock were discovered. The Texas Trap Rock Company established a quarry about 1911 and shipments of rock began in 1912. A large hig
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