Field Trip and Fossil Fun
Rock&Gem Magazine|May 2020
It was field trip fun for a group of nine, including members from the Oxnard Gem & Mineral Society (OGMS), Conejo Gem & Mineral Club (CGMC), and the Ventura Gem & Mineral Society (VGMS), in early February with an adventure at the Nuevo Silica Mine, according to a report by David Springer, Field Trip Chair for VGMS, published in a recent issue of the club’s Rockhound Rambling newsletter.
Antoinette Rahn
Field Trip and Fossil Fun

As Springer stated in his report, the mine, located in Perris, California, “was worked for feldspar and silica from 1916 through 1918. The mine is a quartz-feldspar pegmatite, exposed in Mesozoic diorite, forming three zones. The outer zone is a graphic granite, featuring large biotite crystals; the intermediate zone is a coarse-grained mixture of quartz, feldspar, and black tourmaline; the central zone was primarily quartz, and was mostly removed during mining.”

While the weather was a beautiful combination of sun and warmth, the group faced a few challenges accessing the site, due to previous rains washing gullies into the mine roads. However, the group patiently and successfully reached the mine and were rewarded with a variety of treasures, as well as many amazing views. Springer describes one such section of the mine, “A huge smoky quartz crystal—at least 2 feet long—was embedded in a wall of feldspar about 25 feet off the quarry floor. It was closely guarded by a beehive.”

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