![]() ![]() GEOLOGY The volcanic flows located in the western portion of the study area contain olivine basalt and cinder cones. LOCATION: The Cinder Cone Lava Beds District is northeast of the Old Dad Mountains, west of Teutonia Peak, north of the Kelso Mountains, southwest of Shadow Valley, west of the Ivanpah Mountains and south of Solomon’s Knob in T.13 to 15N, R.10 to 13E, SBM. Additionally, many other cinder cones in the region have cinders of commercial quality (Rumsey and McMahan, 1985, p. ![]() However, the two mines outside the WSA have adequate resources to supply local market demand for the foreseeable future. Two cinder cones within the WSA contain about 30 million tons of volcanic cinders similar to those mined adjacent to the southeast border of the WSA. MINE DEVELOPMENT Cinder prospect 6 has as 20 million tons and prospect 7 has 10 million tons of volcanic volcanic cinders classified as other occurrences similar in composition and texture to those mined adjacent to the southeastern boundary of the WSA (Rumsey and McMahan, 1985, p. Two cinder cones consist of red and black, coarse to medium cellular, well-bedded cinders that range in size from less than 1/8 inch to 6 inches as angular blocks (Rumsey and McMahan, 1985, p. Height of both cones is 280 ft, the radius at the base of the cone at prospect 6 is 1,100 ft and at prospect 7 is 1,450 ft the radius at the top of the frustum of cone 6 is 240 ft and at prospect 7 is 130 ft (Rumsey and McMahan, 1985, p. About 10 million tons and 20 million tons of volcanic cinder are at prospects 6 and 7, respectively. and are similar to those at the nearby Cima and Aiken Cinder Mines (fig. The black and rusty-red (oxidized) cinders are medium- to coarse-cellular, have diameters ranging from less than 1/8 in. Placer claims were located on these prospects. Volcanic cinders suitable for commercial use occur at two localities inside the WSA (fig. 2), related to an older basalt flow, is heavily weathered and its cinders are not suitable for commercial use. A cinder cone in the northeastern part of the WSA (fig. Cinder cones in the region rest upon olivine basalt flows. Cone surfaces consist predominantly of black cinders and flows, while red cinders, which result from iron being in a high oxidation state, commonly formed within the cinder cone cores (U.S. Naturally disaggregated black and red cinders occur within late Tertiary volcanic cinder cones. Miller and others (2007) mapped them as Quaternary or Tertiary basalt cinder cone (QTbc). MINE GEOLOGY Hewett (1956) mapped the area of the Unnamed Cinder Cones No. The basalt flows are composed of fine- to medium-grained phenocrysts of plagioclase, olivine, and some augite, set in a dense intergrowth of plagioclase laths, interstitial olivine, magnetite, augite and dark glass (Joseph, 1984, p. Volcanic bombs are abundant, especially along bedding planes. The cinders are red to black, coarse- to medium-cellular, and are less than one eighth of an inch to six inches in their longest dimension, but locally are agglutinated to form masses up to 2 to 3 feet across. The flows reach a maximum thickness of about 400 feet and the cinder cones are as much as half a mile in diameter, ranging from 200 to 400 feet in height. The older flows are weathered and eroded, while the younger ones appear fresh and may have-been extruded in historic times. Joseph (1984) gave this general description of volcanic flows in The volcanic flows located in the western portion of the study area contain olivine basalt and cinder cones. DISTRICT GEOLOGY The district is mainly composed of Quaternary basalt that flowed out upon an erosional surface underlain largely by Cretaceous Teutonia Adamellite (Miller and others, 2007). 2 OWNERS Formerly Aiken Cinders, land managed by U.S. 2 is listed in MRDS (2011) as being located in: Legal Location Latitude Longitude 14N 11E Sec. LOCATION The Cinder Cone Lava Beds District is northeast of the Old Dad Mountains, west of Teutonia Peak, north of the Kelso Mountains, southwest of Shadow Valley, west of the Ivanpah Mountains and south of Solomon’s Knob in T.13 to 15N, R.10 to 13E, SBM. ![]()
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