Late Cenozoic volcanism in the Lassen area, southernmost Cascade Range, California
Clynne MA, Muffler LJ, Dalrymple GB. 1993. Late Cenozoic volcanism in the Lassen area, southernmost Cascade Range, California. Pages 22. In Geological Society of America, 89th annual Cordilleran Section meeting and 46th annual Rocky Mountain Section meeting Abstracts with Programs Geological Society of America. Reno, NV. May 19-21, 1993
Volcanism in the southernmost Cascade Range can be characterized as (1) regional volcanism, primarily basaltic to andesitic with hundreds of coalescing volcanoes of small volume with short lifespans forming a broad platform; and as (2) a few long-lived and much larger volcanic centers which consist of a basaltic-andesite to andesite composite cone and flanking silicic domes and flows. Four volcanic centers have been determined south and southeast from Lassen Peak. The Yana volcanic center was located in the drainage of Butt Creek and was active in the Late Pliocene. The Maidu volcanic center was active from 2.4 to .8 Ma. The Dittmar volcanic center was located from 1.8 to .7 Ma. The Lassen volcanic center was active .65 Ma. Two types of baslat are seen in the southernmost Cascades. Medium-K calcalkaline (CAB) and low-K olivine tholeiite (LKOT).
- Type
- Conference Proceeding Paper
- Authors
- Clynne, Michael; Muffler, L; Dalrymple, G
- Units
- LAVO
- Keywords
- Cenozoic, Dittmar, Lassen, low-K olivine tholeiite, maidu, medium-K calcalkaline (CAB), Physical Sciences, volcanic center, Volcanism, Yana