Joel E Robinson

Database for the Geologic Map of Three Sisters Volcanic Cluster, Cascade Range, Oregon

A database of geologic map of Three Sisters Volcanic Cluster as described in the original abstract: The geologic map represents part of a late Quaternary volcanic field within which scores of eruptions have taken place over the last 50,000 years, some as recently as ~1,500 years ago. No rocks of early Pleistocene (or greater) age crop out within the map area, although volcanic and derivative sedimentary rocks of Miocene and Pliocene age are widespread to the east and west and are certainly buried beneath the younger volcanic field. Of the 145 volcanic map units described herein, only 22 are certainly older than late Pleistocene (>126 ka), and 12 are postglacial (<15 ka). The oldest unit identified yields an age...

Categories: Data; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service; Tags: Andesite, Basalt, Basaltic andesite, Bend, Oregon, Dacite, All tags... Geochemistry, Geomorphology, Geophysics, Oregon, Rhyodacite, Rhyolite, Sisters, Oregon, Three Sisters Volcanic Cluster, Three Sisters Volcanic Cluster, USGS Science Data Catalog (SDC), United States of America, Volcanology, biota, debris avalanche, lava flows, Fewer tags

Database for the Geologic Map and Structure Sections of the Clear Lake Volcanics, Northern California

This geologic map database is a reproduction of U.S. Geological Survey Miscellaneous Investigations Map I–2362: “Geologic Map and Structure Sections of the Clear Lake Volcanics, Northern California” (Hearn, Donnelly-Nolan, and Goff, 1995). The database consists of a geologic map, three structural cross sections and a table of petrographic data for each map unit by mineral type, abundance, and size. The Clear Lake Volcanics are in the California Coast Ranges about 150 km north of San Francisco. This Quaternary volcanic field has erupted intermittently since 2.1 million years ago. This volcanic field is considered a high-threat volcanic system (Ewert and others, 2005). The adjacent Geysers geothermal field, the largest...

Tags: California, Clear Lake, Geochemistry, Geography, Geomorphology, All tags... Lake County, Land Use Change, Mount Konocti, Sonoma County, Stratigraphy, The Geysers, USGS Science Data Catalog (SDC), United States of America, climatologyMeteorologyAtmosphere, earth sciences, geologic maps, geology, health, volcanoes, volcanology, Fewer tags

Geologic map database to accompany geologic map of the State of Hawaii

This digital publication contains all the geologic map information used to publish U.S. Geological Survey Geologic Investigations Map Series SIM-3143 (Sherrod and others, 2021). This geologic map shows the distribution and stratigraphic relation of volcanic, intrusive, and sedimentary units emplaced in the past 8 million years across the eight principal islands of the Hawaiian archipelago, State of Hawaii, U.S.A. This geologic map database is accompanied by a report, which includes the formatted geologic map and explanatory pamphlet, available at https://doi.org/10.3133/sim3143​. The authors ask that users of the geologic map database cite both the report and the database: Report: Sherrod, D.R., Sinton, J.M.,...

Categories: Data; Types: ArcGIS Map Package, ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service; Tags: Hana, Hawaii, Honolulu, Kahoolawe, Kauai County, All tags... Lanai, Maui, Molokai, Niihau, Oahu, USGS Science Data Catalog (SDC), United States, Volcanology, Wailuku, faults, geologic maps, geology, geoscientificInformation, volcanoes, Fewer tags

Yellowstone Sample Collection - database

This database was prepared using a combination of materials that include aerial photographs, topographic maps (1:24,000 and 1:250,000), field notes, and a sample catalog. Our goal was to translate sample collection site locations at Yellowstone National Park and surrounding areas into a GIS database. This was achieved by transferring site locations from aerial photographs and topographic maps into layers in ArcMap. Each field site is located based on field notes describing where a sample was collected. Locations were marked on the photograph or topographic map by a pinhole or dot, respectively, with the corresponding station or site numbers. Station and site numbers were then referenced in the notes to determine...

Categories: Data; Tags: USGS Science Data Catalog (SDC), Volcanology, Yellowstone plateau, caldera, rhyolite, All tags... rock samples, Fewer tags

Hazard boundaries for the volcanic hazard assessment of Medicine Lake volcano, California

Medicine Lake volcano (MLV) is a very large shield-shaped volcano located in northern California where it forms part of the southern Cascade Range of volcanoes. It has erupted hundreds of times during its half-million-year history, including nine times during the past 5,200 years, most recently 950 years ago. This record represents one of the highest eruptive frequencies among Cascade volcanoes and includes a wide variety of different types of lava flows and at least two explosive eruptions that produced widespread fallout. Compared to those of a typical Cascade stratovolcano, eruptive vents at MLV are widely distributed, extending 55 km north-south and 40 km east-west. The total area covered by MLV lavas is >2,000...

Tags: California, Klamath National Forest, Lava Beds National Monument, Medicine Lake, Medicine Lake volcano, All tags... Modoc, Modoc National Forest, Shasta-Trinity National Forest, Siskiyou, USGS Science Data Catalog (SDC), Volcanic ash, Volcanology, hazards, volcanic activity, volcanic eruption prediction, volcanic rocks, volcanology, Fewer tags