Volcanic Ash from Mount Mazama (Crater Lake) and from Glacier Peak

1964/06/12 by Howard A. Powers, Ray E. Wilcox · 4 citations
Earth and Planetary Sciences · #Geology and Paleoclimatology Research #Geology #Impact crater #Petrography #Glacier #Volcano #Volcanic ash #Mount #Rock glacier #Geochemistry #Glacial period #Physical geography #Geomorphology #Earth science #Astrobiology #Geography

paper · doi:10.1126/science.144.3624.1334

openalex publication_date 1964/06/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/23

Abstract

New petrographic and chemical data indicate that the great Mount Mazama eruption at Crater Lake, Oregon, about 6600 years ago was the source of most ash which has been called "Glacier Peak" and of some ash called "Galata." Glacier Peak volcano in Washington was itself the source of an older ash deposit, perhaps very late glacial or early postglacial in age.

Cited by

• Eruptive history of Mount Mazama and Crater Lake Caldera, Cascade Range, U.S.A.
• Mazama and Glacier Peak Volcanic Ash Layers: Relative Ages
• Late Wisconsinan and Holocene history of southwestern Saskatchewan
• Mount Mazama [wikipedia]