Ignimbrite is a type of volcanic rock, consisting of hardened tuff. [1] . Ignimbrites form from the deposits of pyroclastic flows, which are a hot suspension of particles and gases flowing rapidly …

Apr 1, 2021 · Although lava flows of Deschutes Formation age are exposed on ridge tops west of the High Cascades graben, few ignimbrites of equivalent age are preserved to the west, …

Jun 1, 2017 · In this study, the timing and frequency of eruptions which produced 14 laterally extensive marker ignimbrites within the Deschutes Formation are established using 40 Ar/ 39 …

tes Basin. The Deschutes River began (Smith, 1986). These deposits, which constitute to cut back down through layers of lava and the Deschutes Formation, consist of ignimbrites, …

river, the rolling, juniper-clad expanse of west-central Oregon has become a storybook instead of remaining a mystery. From Redmond to Gateway, the walls of the spectacular canyon of the …

Apr 1, 2021 · Although Deschutes-age lava flows are exposed as ridge caps across the Western Cascades, the poorly preserved ignimbrite record west of the graben may result from a lack of …

Aug 8, 2023 · In this study, we focus on the bimodal Deschutes Formation ignimbrite flare-up of Central Oregon, which erupted unusually high volumes of pyroclastic material 6.25–5.45 Ma …

The late Neogene Deschutes Formation of central Oregon preserves a remarkable volcanic and sedimentary record of the initial stages of High Cascades activity following an eastward shift in …

May 1, 2000 · In this study, the timing and frequency of eruptions which produced 14 laterally extensive marker ignimbrites within the Deschutes Formation are established using ⁴⁰Ar/³⁹Ar …

Jan 30, 2021 · Semantic Scholar extracted view of "Tephrochronology of North America's most recent arc-sourced ignimbrite flare-up: The Deschutes Formation of the Central Oregon …