div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documentusgs-2011-04-18-topopah-spring-member-plate-2-geophysical-usw-usw-rhyolite-lavashtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: USGS · 2011-04-18 · Topopah Spring Member PLATE 2 Geophysical USW USW Rhyolite Lavas and tuffs Crater Flat Tuff Prow Pass Member Bullfrog Member Calico w logs and stratigraphic loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader033fdocumentpubreader033viewer20220502055f58624c28b6e84cc55772a8html5thumbnails1jpg width=140 height=200 divdiv