Some time during a 10–15 million-year period, lava flow after lava flow poured out of multiple dikes which trace along an old fault line running from south-eastern Oregon through to western British Columbia. The many layers of lava eventually reached a thickness of more than 1.8 km (5,900 ft). As the molten rock came to the surface, the Earth's crust gradually sank into the space left b… WebMay 15, 2016 · The Middle Miocene Columbia River Basalt Group (CRBG) is the youngest and smallest continental flood basalt province on Earth, covering over 210,000 km2 of Oregon, Washington, and Idaho and having ...
A window into Yellowstone
WebFeb 4, 2024 · The northern part of the Craters of the Moon laps up against the White Knob and Pioneer Mountains. As the largest volcanic field in the region, it covers about 1600 km 2 (620 mi 2) and contains more than 60 discernible lava flows that were erupted from one fissure system during eight episodes over the past approximately 15 k.y. About 25 cinder WebEastern Washington has vast areas covered by Columbia River Basalt (CRBs), a series of flood basalts. Flood basalts are large volcanic eruptions where a great deal of lava is erupted and covers an extensive area. ... Enough time passed between lava flow events that the tops of the flows hardened to rock and weathered, breaking into pieces that ... earl foster funeral home.com
Geologic History of Haystack Rock
WebThe Central Atlantic magmatic province (CAMP) is the Earth's largest continental large igneous province, covering an area of roughly 11 million km 2.It is composed mainly of basalt that formed before Pangaea broke … WebWhat we know as the eastern border of Oregon, Washington, and Idaho was a site of violent volcanic activity. Fissures spewed hot molten lava that reached the West coast in only a … WebMar 9, 2024 · Creating the Channeled Scablands. During the last ice age, 18,000 to 13,000 years ago, the landscape of eastern Washington was repeatedly scoured by massive … css grid divider line