div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=pubsusgsgov-trout-creek-formation-first-described-by-smith-1927-consists-ofhtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: pubsusgsgovTROUT CREEK FORMATION first described by Smith 1927 consists of gray to tan tuffaceous sandstone and siltstone and shale interstratified with white to tan diatomite loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader037vdocumentinreader037viewer2022090610607119567d08236ea5333e4bhtml5thumbnails1jpg width=140 height=200 divdiv