Pg. 252-256, 285 (App. 1). McConnell Canyon Volcanics. [Authors indicate this is a formal proposal, thus to lessen confusion, the name is capitalized here.] Divided into (ascending): (1) andesite member, interbedded breccias and flows with lesser andesitic sandstones, about 1,100 m thick; and (2) rhyolite member, flows, domes, and intrusions surrounded by and interbedded with breccia, conglomerate, and tuffaceous sandstone, about 300 m thick. Base of formation not exposed. Disconformably underlies Malachite Mine Formation. U-Pb zircon age of 232.2 +/-2.3 Ma, obtained from quartz porphyry intrusion in middle part of formation, indicates either late Middle Triassic age (according to Gradstein et al, 2004) or early Late Triassic age (according to Muttoni et al, 2004). Fossils recovered from the overlying Malachite Mine indicate an early Late Triassic (late Carnian) age. Thus, authors consider age of formation to be earliest Late Triassic or older.
Type section: between the mouth of McConnell Canyon at east edge of Singatse Range and a point 1.4 km to west-northwest, in secs. 32 and 33, T. 13 N., R. 25 E., and secs. 4 and 5, T. 12 N., R. 25 E., Yerington 7.5-min quadrangle [1986 prov. ed.], Yerington region, Lyon Co., west-central NV. Named from McConnell Canyon.

Source: Publication.