Lêer:Mount Mazama eruption timeline.PNG

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Oorspronklike lêer ‎(250 × 841 piksels, lêergrootte: 187 KG, MIME-tipe: image/png)

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Opsomming

Beskrywing

Cataclysmic eruption to present. Eruptions of ash and pumice: The cataclysmic eruption started from a vent on the northeast side of the volcano as a towering column of ash, with pyroclastic flows spreading to the northeast. Caldera collapse: As more magma was erupted, cracks opened up around the summit, which began to collapse. Fountains of pumice and ash surrounded the collapsing summit, and pyroclastic flows raced down all sides of the volcano. Steam explosions: When the dust had settled, the new caldera was 5 miles (8 km) in diameter and 1 mile (1.6 km) deep. Ground water interacted with hot deposits causing explosions of steam and ash. Today: In the first few hundred years after the cataclysmic eruption, renewed eruptions built Wizard Island, Merriam Cone, and the central platform. Water filled the new caldera to form the deepest lake in the United States. Figure modified from diagrams on back of 1988 USGS map “Crater Lake National Park and Vicinity, Oregon.”
Bron http://pubs.usgs.gov/fs/2002/fs092-02/ (saved as PNG)
Outeur U.S. GEOLOGICAL SURVEY and the NATIONAL PARK SERVICE
Ander weergawes
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Lisensiëring

Public domain
This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.

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Crater Lake is an example, it is located in Oregen and was made from a valcano, making a caldera.

Lêergeskiedenis

Klik op die datum/tyd om te sien hoe die lêer destyds gelyk het.

Datum/TydDuimnaelDimensiesGebruikerOpmerking
huidig05:24, 29 Maart 2006Duimnaelskets vir weergawe vanaf 05:24, 29 Maart 2006250 × 841 (187 KG)JkellySource: http://pubs.usgs.gov/fs/2002/fs092-02/ (saved as PNG) Author: U.S. GEOLOGICAL SURVEY and the NATIONAL PARK SERVICE Description: <blockquote>Cataclysmic eruption to present. Eruptions of ash and pumice: The cataclysmic eruption started from a ve

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