Scope and arrangement of guidebook -- Acknowledgments -- Part I : Geologic sketch of the Newport area, Oregon -- Introduction -- Geologic setting -- Stratigraphy -- Siletz River volcanics -- Tyee Formation -- Yamhill Formation -- Nestucca Formation -- Oligocene siltstone -- Yaquina Formation -- Nye mudstone -- Astoria Formation -- Middle Miocene volcanic and sedimentary rocks -- Basalt of Depoe Bay -- Sandstone of Whale Cove -- Basalt of Cape Foulweather -- Post-middle Miocene sedimentary rocks -- Quaternary deposits -- Intrusive rocks -- References.