43 pages matching "The ancient forests of Oregon" in this book
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abundant Arcto-Tertiary flora Asia basalt birch Bridge Creek Bridge Creek flora Carboniferous Cascade Range Cenozoic Central China Chaney Clarno Clarno Bridge Clarno flora Clarno formation climate Coast coast redwood collected conifers Crooked River Crooked River Basin cycads dawn redwood deposits east eastern Oregon environment Eocene Eocene floras epoch fern floras of Oregon forests of Oregon fossil fossil flora Fossil leaves fossil plants genera geologic ginkgoes hills John Day Basin John Day River Jurassic katsura known lake leaf impressions leaves and fruits living equivalents living relatives lower Mascall flora Mascall species Merriam Mesozoic Metasequoia Middle-Tertiary miles Miocene numerous occurrence Oligocene past Period Plate VII Pliocene preserved rainfall Rattlesnake formation record region represented resembling rocks sediments Sequoia shale Shui-hsa-pa slope specimens subtropical sycamore Taxodium temperate temperatures Tempskya Tertiary Thomas Condon trees tropical valley Vanora Grade vegetation of Oregon volcanic ash West Branch Creek western North America willow