Nevada Geologic Map Nevada Geologic Map 34 3/4″ x 24 1/4″, 2020 Slabs: Marble, serpentine breccia, travertine, sodalite syenite, slate, syenite Specimen: Realgar, fire opal, clinoclase, gold nugget, vesuvianite, vanadinite on descloizite, creedite, barite, scholzite, turquoise, spessartine garnet, malachite pseudomorph after azurite; Fossils: Olenellus fowleri