Columbia River Basalt Group - Wikipedia
The 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 2 (81,000 sq …
Flood basalt - Wikipedia
A flood basalt (or plateau basalt[1]) is the result of a giant volcanic eruption or series of eruptions that covers large stretches of land or the ocean floor with basalt lava. Many flood basalts have …
Basalt - Wikipedia
Basalt (UK: / ˈ b æ s ɒ l t,-ɔː l t,-əl t /; [1] [2] US: / b ə ˈ s ɔː l t, ˈ b eɪ s ɔː l t /) [3] is an aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in …
Columbia River basalts - Idaho State University
At places in western Idaho, the Imnaha Basalt is 900 meters thick, filling Miocene paleocanyons of the Clearwater River System. Accounting for approximately 90% of all the basalt in the …
Columbia River Basalt Group Stretches from Oregon to Idaho
2023年12月7日 · 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 …
Columbia River Basalt Stratigraphy in the Pacific Northwest
2013年12月19日 · The Columbia River Basalt Group (CRBG) consists of a thick sequence of Miocene flood basalt that covered northern Oregon, eastern Washington, and western Idaho …
Columbia Plateau Regional aquifer system | U.S. Geological Survey
2021年3月8日 · The primary aquifers of the Columbia Plateau regional aquifer system (CPRAS) are basaltic lava flows of the Columbia River Basalt Group and overlying basin-fill sediments. …
WA100: A Washington Geotourism Website
At 16.7 million years old, the CRBs are the youngest and smallest flood basalt group on Earth. The basalt erupted from fissures in the ground, likely sourced by an upwelling of magma from …
Basalt | Definition, Properties, & Facts | Britannica
Basalt, extrusive igneous (volcanic) rock that is low in silica content, dark in color, and comparatively rich in iron and magnesium. Basalts may be broadly classified on a chemical …
弧后盆地玄武岩的成分变化及其成因 - ysxb.ac.cn
2020年7月2日 · Back-arc basin basalt (BABB) is the product of rifting and spreading ridge magmatism of back-arc basin. The geochemical compositions of BABB record the information …