1 / 5

Geologic Setting of the High Lava Plains

Geologic Setting of the High Lava Plains. Kelsii Dana. Overview. High Lava Plains of eastern Oregon bound by: North- Blue Mountains East- Precambrian North America South- Basin and Range West- Cascade Range. The Crust. NE/C OR and W ID: Paleozoic-Mesozoic oceanic volcanic arcs

rsanderson
Download Presentation

Geologic Setting of the High Lava Plains

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Geologic Settingof the High Lava Plains Kelsii Dana

  2. Overview • High Lava Plains of eastern Oregon bound by: • North- Blue Mountains • East- Precambrian North America • South- Basin and Range • West- Cascade Range

  3. The Crust • NE/C OR and W ID: • Paleozoic-Mesozoic oceanic volcanic arcs • Accretionary complexes • Basinal successions • Similar terranes in Klamaths • Crust 30-42 km thick, thickening eastward

  4. Regional Volcanism • Voluminous Cenozoic volcanism: • Ignimbrite sweep • Flood basalts • Bimodal (modern) • Highest bimodal volumes deposited: • High Lava Plains • Snake River Plain

  5. Regional Volcanism • Two migrating tracks: • NE along Snake River Plain toward Yellowstone • WNW along High Lava Plains (ends at Newberry) • Indicated link between High Lava Plains and Cascades volcanism: • Increased volcanic output • Isotopic similarities • Merging structures

More Related