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Just to the south of the unincorporated community of Capon Lake, five miles south of Wardensville, is a quarry where early to middle Devonian fossils can be found in the rocks of the Needmore Formation. Local fossils include the ammonoid Agoniatites venuxemi, bivalves, brachiopods, the nautiloid Michelinoceras subulatum, the conularid Conularia, horn corals, crinoids, the gastropod Loxonema, ostracodes, and trilobites.