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Two major caldera-forming eruptions have occurred, the first about 560,000 years ago in an eruption which expelled about 15 cubic kilometres (3.6 cu mi) of material. The second some time between 40,000 and 150,000 years ago, in a smaller but still sizable eruption of 2 cubic kilometres (0.48 cu mi) of material.
Name Elevation Coordinates Last eruption meters feet Azufral: 4070: 13,353: 930 BC ?: Cerro Bravo: 4000: 13,123: 1720 ± 150 years : Cerro Machín: 2749: 9,019: 1180 ...
Geologists and volcanologists making preparations at the Galeras stratovolcano hours before the eruption. The Galeras tragedy occurred when six scientists and three tourists were killed as a result of the January 1993 eruption of the Galeras stratovolcano in Colombia. Geologist Stanley Williams and six others on the volcano survived.
The Columbia River Basalt Group (including the Steen and Picture Gorge basalts) extends over portions of four states. 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 mi) mainly eastern Oregon and Washington, western Idaho, and part of northern Nevada. [1]
Reintroduction of wolves. Wolves were reintroduced to the park in 1995, after being driven extinct in the area nearly 100 years ago. It is estimated that approximately 500 wolves are present now ...
The Ringold Formation represents sand and gravel placed by the Columbia River between 9 and 3 million years ago. These deposits overlay cooled lava erupted as part of the Columbia River Basalt Group, a type of volcanic eruption known as flood basalts erupting from fissures across eastern Washington and Oregon that were unrelated to the Cascade Range. [11]
The transformation of St. Vincent commenced with a cracklike thunder followed by a storm of ash late last week. Within the passage of a day, the once vibrant city of Richmond Vale on the island of ...
The following is a list of films produced and/or released by Columbia Pictures in 1990–1999. Most films listed here were distributed theatrically in the United States by the company's distribution division, Sony Pictures Releasing (formerly known as Columbia TriStar Film Distributors International) (1991–2005).