### Field-trip guides to selected volcanoes and volcanic landscapes of the western United States

By: Water Resources Division, U.S. Geological Survey

                            https://doi.org/10.3133/sir20175022

#### Links

- Chapters:
                                        Chapter                                            A                                                                                                : 
                                                                                                Geologic Field-Trip Guide to Volcanism and its Interaction with Snow and Ice at Mount Rainier, Washington                                                                                        

                                        Chapter                                            B                                                                                                : 
                                                                                            Field-trip guide to subaqueous volcaniclastic facies in the Ancestral Cascades arc in southern Washington State—The Ohanapecosh Formation and Wildcat Creek beds                                                                                        

                                        Chapter                                            C                                                                                                : 
                                                                                            Field-trip guide for exploring pyroclastic density current deposits from the May 18, 1980, eruption of Mount St. Helens, Washington                                                                                        

                                        Chapter                                            D                                                                                                : 
                                                                                            Field-trip guide to Mount St. Helens, Washington - An overview of the eruptive history and petrology, tephra deposits, 1980 pyroclastic density current deposits, and the crater                                                                                        

                                        Chapter                                            E                                                                                                : 
                                                                                                Field Trip Guide to Mount St. Helens, Washington—Recent and Ancient Volcaniclastic Processes and Deposits                                                                                        

                                        Chapter                                            F                                                                                                : 
                                                                                            Geologic field-trip guide of volcaniclastic sediments from snow- and ice-capped volcanoes—Mount St. Helens, Washington, and Mount Hood, Oregon                                                                                        

                                        Chapter                                            G                                                                                                : 
                                                                                            Field-trip guide to Mount Hood, Oregon, highlighting eruptive history and hazards                                                                                        

                                        Chapter                                            H                                                                                                : 
                                                                                            Field-trip guide to mafic volcanism of the Cascade Range in Central Oregon—A volcanic, tectonic, hydrologic, and geomorphic journey                                                                                        

                                        Chapter                                            I                                                                                                : 
                                                                                            Emplacement of Holocene silicic lava flows and domes at Newberry, South Sister, and Medicine Lake volcanoes, California and Oregon                                                                                        

                                        Chapter                                            J                                                                                                : 
                                                                                            Overview for geologic field-trip guides to Mount Mazama, Crater Lake Caldera, and Newberry Volcano, Oregon                                                                                        

                                        Chapter                                            J1                                                                                                : 
                                                                                            Geologic field trip guide to Mount Mazama and Crater Lake Caldera, Oregon                                                                                        

                                        Chapter                                            J2                                                                                                : 
                                                                                            Field-trip guide to the geologic highlights of Newberry Volcano, Oregon                                                                                        

                                        Chapter                                            K                                                                                                : 
                                                                                            Overview for geologic field-trip guides to volcanoes of the Cascades Arc in northern California                                                                                        

                                        Chapter                                            K1                                                                                                : 
                                                                                            Geologic field-trip guide to Medicine Lake Volcano, northern California, including Lava Beds National Monument                                                                                        

                                        Chapter                                            K2                                                                                                : 
                                                                                            Geologic field-trip guide to the Lassen segment of the Cascades Arc, northern California                                                                                        

                                        Chapter                                            K3                                                                                                : 
                                                                                            Geologic field-trip guide to Mount Shasta Volcano, northern California                                                                                        

                                        Chapter                                            L                                                                                                : 
                                                                                            Geologic field-trip guide to Long Valley Caldera, California                                                                                        

                                        Chapter                                            M                                                                                                : 
                                                                                            Field-trip guide to a volcanic transect of the Pacific Northwest                                                                                        

                                        Chapter                                            N                                                                                                : 
                                                                                            Field-trip guide to the vents, dikes, stratigraphy, and structure of the Columbia River Basalt Group, eastern Oregon and southeastern Washington                                                                                        

                                        Chapter                                            O                                                                                                : 
                                                                                            Field-trip guide to Columbia River flood basalts, associated rhyolites, and diverse post-plume volcanism in eastern Oregon                                                                                        

                                        Chapter                                            P                                                                                                : 
                                                                                            Geologic field-trip guide to the volcanic and hydrothermal landscape of the Yellowstone Plateau                                                                                        

                                        Chapter                                            Q                                                                                                : 
                                                                                            A field trip guide to the petrology of Quaternary volcanism on the Yellowstone Plateau                                                                                        

                                        Chapter                                            R                                                                                                : 
                                                                                                Field-Trip Guide to Continental Arc to Rift Volcanism of the Southern Rocky Mountains—Southern Rocky Mountain, Taos Plateau, and Jemez Mountains Volcanic Fields of Southern Colorado and Northern New Mexico                                                                                        

- Illustration:  **Field-trip overview map**                            (5 MB pdf)                        
- Download citation as:  RIS                         |                         Dublin                            Core

#### Abstract

First posted June 23, 2017

**For additional information, contact:**
Volcano Science Center - Menlo ParkU.S. Geological Survey345 Middlefield Road, MS 910Menlo Park, CA 94025

The North American Cordillera is home to a greater diversity of volcanic provinces than any comparably sized region in the world. The interplay between changing plate-margin interactions, tectonic complexity, intra-crustal magma differentiation, and mantle melting have resulted in a wealth of volcanic landscapes.  Field trips in this guide book collection (published as USGS Scientific Investigations Report 2017–5022) visit many of these landscapes, including (1) active subduction-related arc volcanoes in the Cascade Range; (2) flood basalts of the Columbia Plateau; (3) bimodal volcanism of the Snake River Plain-Yellowstone volcanic system; (4) some of the world’s largest known ignimbrites from southern Utah, central Colorado, and northern Nevada; (5) extension-related volcanism in the Rio Grande Rift and Basin and Range Province; and (6) the eastern Sierra Nevada featuring Long Valley Caldera and the iconic Bishop Tuff.  Some of the field trips focus on volcanic eruptive and emplacement processes, calling attention to the fact that the western United States provides opportunities to examine a wide range of volcanological phenomena at many scales.

The 2017 Scientific Assembly of the International Association of Volcanology and Chemistry of the Earth’s Interior (IAVCEI) in Portland, Oregon, was the impetus to update field guides for many of the volcanoes in the Cascades Arc, as well as publish new guides for numerous volcanic provinces and features of the North American Cordillera. This collection of guidebooks summarizes decades of advances in understanding of magmatic and tectonic processes of volcanic western North America. 

These field guides are intended for future generations of scientists and the general public as introductions to these fascinating areas; the hope is that the general public will be enticed toward further exploration and that scientists will pursue further field-based research.