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In a recent trip to the Candelaria Mining district of west central Nevada some rocks that suggest fossil forms where found. Is this a fossil? How big where coiled Nautiloids in the Ordivician? Is this more likely Permo-Triassic? I have more pics but the file size limit. Maybe another post later. The rock formations in the area per Mineral, Deposita 29, 318-329 (1994) MINERALIUM DEPOSITA O Springer-Verlag 1994 The Candelaria silver deposit, Nevada - preliminary sulphur, oxygen and hydrogen isotope geochemistry the basement consists of Ordovician cherts of the Palmetto complex; this is overlain unconformably by Permo-Triassic marine clastic sediments (Diablo and Candelaria Formations); these are structurally overlain by a serpentinitehosted tectonic melange (Pickhandle/Golconda allochthon); all these units are cut by three Mesozoic felsic dike systems. The local rock descriptions are obviously simplified. Palmetto Basin Assemblage - Shale, chert, quartzite, greenstone, and limestone Nolan Belt - Shale, chert, phyllite, quartzite, and limestone Diablo Siliciclastic Overlap Assemblage - Sandstone, siltstone, limestone, conglomerate, and carbonaceous limestone Siliciclastic Overlap Assemblage - Shale, sandstone, and limestone Candearia FM Golconda Terrane - Basinal, volcanogenic, terrigenous clastic, and minor carbonate rocks Siliciclastic Overlap Assemblage - Conglomerate, sandstone, siltstone, and limestone Siliciclastic Overlap Assemblage - Shale, sandstone, and limestone Shale with interbedded sandstone and minor limestone characterize the Lower Triassic Candelaria Formation (Ferguson, Muller, and Cathcart, 1954).
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