. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. So. Al'. Ol SCIKNCKS Vol. 50, Part 2. 1951 rliyolitr" (]>. Jll ). I'lx-srnI day temporaluri> of ilir dischar^inj^ ;^ (si)riny;s ami wells) ranij^c from ImiliiiL; lOi' this nllihule ( C) to 43.«VC, in iiKi^t cases. 'rcmiKTalurcs a^ ^li as l?)°C were found hclow llic surface. .\s might be exiiccled, the waters are hi}.,dily charijcd, {assess- ing 2000 to 2500 parts jier million of mineral matter, mostly so- dium, chloride, carbonate, bi
. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. So. Al'. Ol SCIKNCKS Vol. 50, Part 2. 1951 rliyolitr" (]>. Jll ). I'lx-srnI day temporaluri> of ilir dischar^inj^ ;^ (si)riny;s ami wells) ranij^c from ImiliiiL; lOi' this nllihule ( C) to 43.«VC, in iiKi^t cases. 'rcmiKTalurcs a^ ^li as l?)°C were found hclow llic surface. .\s might be exiiccled, the waters are hi}.,dily charijcd, {assess- ing 2000 to 2500 parts jier million of mineral matter, mostly so- dium, chloride, carbonate, bicarbonate, silicon dioxide, sulfate, and considerable boron. The natural spring discharges are ac- tively precipitating siliceous sinter with some calcium carbonate. The springs have also deposited cinnabar, pyrite, .stibnite, gold and silver, while metallic mercur\- ])recipitates out from some of the \apors. The siliceous sinter seems to be mainly 0])al, with a substantial amount of chalcedony and smaller cpiantities of quartz. "Most of the sinter, as far as could be determined, was formed by the drying of siliceous muds and by the direct precipitation of silica from the water, probably as a result of evaporation. Both of these processes are occurring at the present time near the active springs" (Brannock et al). They regard the oldest sinter as "probably middle or late Pleistocene" in age. It does not seem. PLATE 27 A block of siliceous sinter filled with casts and molds of the Mormon cricket, Anabrus simplex. Most of the impressions are those of abdo- mens. X 2/3 rds. 82. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Southern California Academy of Sciences. Los Angeles, Calif. : The Academy
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