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OverviewThe Columbia River Basalt Group (CRBG) is the youngest, smallest and one of the best-preserved continental flood basalt provinces on Earth, covering over 210,000 km (81,000 sq mi) mainly eastern Oregon and … See more
IntroductionDuring the middle to late Miocene epoch, the Columbia River flood basalts engulfed about 163,700 km (63,200 sq mi) of the Pacific Northwest, forming a large igneous province with an estimated volume of 174,300 km (41,800 cu … See more
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Columbia River Basalt Group Stretches from Oregon to Idaho
Dec 7, 2023 · Columbia River Basalt Group map shows main regions of basalt exposure in Washington, Oregon, Idaho and Nevada, USA. Flood basalt lava flow in stacked layers viewed …
Lava Flows | U.S. Geological Survey - USGS.gov
Dec 7, 2023 · The Columbia River Basalt Group (CRBG) is the youngest, smallest and one of the best-preserved continental flood basalt province on Earth, covering over 210,000 km2 of …
Rapid eruption of the Columbia River flood basalt and …
The Columbia River Basalt Group (CRBG) is the youngest, smallest, and best-preserved continental flood basalt. It erupted ~210,000 km 3 of lava in the …
- Author: Jennifer Kasbohm, Blair Schoene
- Publish Year: 2018
Columbia River basalts - Idaho State University
All researchers agree that the volume of lava erupted during the Columbia River basalt episode is truly exceptional. Due to recent improvements in geoscientists' ability to determine the ages of these rocks, workers are also beginning to …
Columbia Plateau Province - U.S. National Park Service
Over 170,000 cubic kilometers (105,633 mi) of basaltic lava, known as the Columbia River Basalts, covers the western part of the province. These tremendous flows erupted between 17 million - 6 million years ago.
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The Columbia River Basalt Group - Exposed by the …
The Columbia River Basalt Group is subdivided into four formations: Imnaha flows [17-17.4 million years ago] deposited lava in northeast Oregon and western Idaho. They account for less than 10 percent of the total volume.
WA100: A Washington Geotourism Website
The Columbia River Basalts (CRBs) are a series of broad lava flows known as flood basalts. The CRBs currently cover large portions of southeast Washington, northeast Oregon and western …
Northwest geologist hot on the trail of Ginkgo lava flow
Jan 13, 2024 · The Ginkgo is part of the Columbia River Basalt Group, an epic series of lava flows that blanketed much of the Pacific Northwest over a few million years in the late Miocene epoch.
Oregon: A Geologic History - Unit 8. Columbia River Basalt: the ...
Most of this huge body of lava (originally covering half of the state) was erupted between 17 million and 15 million years ago, a very brief period in geologic history. Columbia River Basalt …
The Yellowstone Hotspot and Columbia River Basalts
Dec 9, 2019 · Between 17 million and 14 million years ago, huge volumes of basalt lava erupted out of cracks and fissures and covered much of Washington, Oregon, and western Idaho—the Columbia River Basalts.
Columbia Plateau - Columbia River Basin - Columbia River Flood …
Over 300 high-volume individual lava flows have been identified, along with countless smaller flows. Numerous linear vents, some over 90 miles long, show where lava erupted near the …
Columbia River Basalts - Discover Lewis & Clark
The study of the Columbia River Basalt Group has focused primarily on subdividing thousands of feet of undifferentiated volcanic deposits into different lava flows, fluvial deposits, and other …
Columbia River Basalts - U.S. National Park Service
Feb 23, 2022 · Basalts deposited by volcanic activity shaped the Columbia River watershed. This wayside provides information about some of the lava flows that shaped the local landscape, …
Rapid eruption of the Columbia River flood basalt and correlation …
The Columbia River Basalt Group (CRBG) is the youngest, smallest, and best-preserved continental flood basalt. It erupted ~210,000 km 3 of lava in the Pacific Northwest, United …
The Columbia River Basalts | Science - AAAS
Between 17 million and 6 million years ago, 200,000 square kilometers of the American Northwest were flooded by basaltic lava that erupted through fissures in the crust up to 150 kilometers …
Magma’s heat slowly built today’s Columbia River basalts
Jul 17, 2020 · Ancient volcanic fissures in the Columbia River flood basalts, exposed by uplifting and erosion, are helping University of Oregon researchers understand how magma that …
Field-trip guide to Columbia River flood basalts, associated …
Aug 9, 2017 · Beginning in Portland, the Day 1 log traverses the Columbia River gorge eastward to Baker City, focusing on prominent outcrops that reveal a distal succession of laterally …
Uplifting of Columbia River basalts opens window on how region …
Jul 17, 2020 · Information drawn from analyses of oxygen and hydrogen isotopes of materials from exposed Columbia River basalts has provided insights about how magma from volcanic …
Volcanic Mudflows | A Hidden Danger Lurking in the Pacific …
Feb 19, 2025 · The 1980 eruption of St. Helens was an inflection point. While volcanoes are known for producing sinewy streams of lava and billowing plumes of ash, the St. Helens …
A new model for the emplacement of Columbia River basalts as …
Jan 1, 1996 · Extensive flows of the Columbia River Basalt (CRB) Group in Washington, Oregon, and Idaho are dominantly inflated compound pahoehoe sheet lavas.
Columbia River Gorge hit hard by atmospheric river as Portland …
Feb 24, 2025 · The Columbia River Gorge was hit with flooding, rockslides and powerful winds on Feb. 23 as an atmospheric river bombarded the region, bringing record rain to downtown …
