Greenwater volcanics [T.P. Thayer, unpublished] are typically exposed between Greenwater Canyon and Brown's Peak, in the Greenwater Range [Greenwater Canyon 7.5' quad], Inyo Co, CA. Consists of fresh, glassy andesitic and latitic lavas, tuffs, and breccias, which in Greenwater Canyon interfinger with pumiceous water-laid tuffs. Thickness is 2500 ft. Unconformably overlies the Furnace Creek formation (new); unconformably underlies the Funeral fanglomerate (new). Age is Pliocene(?) [based on stratigraphic position].

Source: GNU records (USGS DDS-6; Menlo GNULEX).

Greenwater volcanics as named by Noble (1941) are redescribed, and informally divided into a lower tuff-breccia and an upper vitrophyre member. Reference locality is located between Greenwater Canyon and the west side of the Greenwater Range [Greenwater Canyon 7.5' quad], Inyo Co, CA. The tuff-breccia member has three distinctive units (ascending): 1) pumiceous sandstone, grit, and fine conglomerate that is slightly limy, and is well sorted (5-10 ft), 2) pumiceous sandstone, conglomerate, and tuff-breccia that is poorly bedded and sorted (75-200 ft), and 3) massive tuff-breccia (75-150 ft). The vitrophyre consists of pale red, very light gray, reddish black, and pale orange flows consisting of massive vitrophyre, vitrophyre agglomerate, felsitic vitrophyre, or a combination of these rock types. Thickness ranges to 1000 ft. Unconformably overlies and interfingers with the Furnace Creek formation or older volcanics. Part of the Greenwater unconformably underlies the Funeral formation. Age is Pliocene(?).

Source: GNU records (USGS DDS-6; Menlo GNULEX).

Age of the Greenwater Volcanics is revised from Pliocene(?) to: Pliocene, based on stratigraphic position.

Source: GNU records (USGS DDS-6; Menlo GNULEX).