Basalt on the Slip-Strike Hamblin Fault

35.969566, -114.875837 A walk thru lavas of Basalt, Dacite, Andesite, and a magma chamber of Quartz Monzonite. Basin and Range sequencing of Miocene lavas as felsic melted granite crust and eventually the basaltic ocean floor subducting basalt terminated the eruptions here. Still have basaltic eruptions today around the Basin and Range periphery where the crust is thinnest, some of the thinnest on earth. Rusted olivine phynochrysts in our basalt. Iddingsite: reddish brown replacement of olivine consisting of smectite, chlorite, goethite, and hematite. Free latest geologic map: https://pubs.nbmg.unr.edu/Prel-geol-B... Free latest geologic map a little more eastward: https://pubs.nbmg.unr.edu/Prel-geol-B... Pure Prairie League on YouTube:    • Two Lane Highway