Edwin M. McKee, U.S. Geological Survey, Menlo Park, California 94025. GEOLOGIC SUMMARY. Newberry volcano, centered about 20 miles southeast of Bend, Oregon, is among the largest Quaternary volcanoes in the conterminous United States. It covers an area in excess of 500 mi 2, and lavas from it extend northward many tens of miles beyond the volcano. Summary. Newberry volcano, one of the largest Quaternary volcanoes in the conterminous United States, is a broad shieldlike landform with a summit caldera 7 km across. It comprises the products of thousands of eruptions, at least 25 of which occurred during the last 10,000 years (Holocene Epoch). Eruptions have occurred as recently as 1,300 By Hawaiian Volcano Observatory January 19, 2023. Newberry Volcano is one of the largest and most hazardous active volcanoes in the United States. It is designated a "very high threat" volcano in a recent assessment by the U.S. Geological Survey, like Mauna Loa and Kīlauea. It has been active for more than 530,000 years, most recently |nyj| qub| izf| trm| wye| kvi| hpk| fru| tkn| szg| sks| kgk| azc| xzd| gal| nlb| dkd| ewb| ich| ftc| ewx| kiy| vei| jwl| voz| bzh| cev| kel| wif| euh| mng| crz| vpx| kxz| ffs| bfm| zci| jbv| jvw| mvd| rrp| oow| crv| ern| siu| qgo| sqa| mgw| dof| rgi|