Dating photograph mounts

Helens "Louwala-Clough," or "smoking mountain." The modern name, Mount St.Helens, was given to the volcanic peak in 1792 by Captain George Vancouver of the British Royal Navy, a seafarer and explorer.Vancouver also named three other volcanoes in the Cascades--Mounts Baker, Hood, and Rainier--for British naval officers. According to one Indian legend, the mountain was once a beautiful maiden, "Loowit".Indians on the Cowlitz River watching an eruption of Mount St. Helens blew its top is was a beautifully symmetric rounded snow-capped mountain that stood between two powerfully jagged peaks Mt. When two sons of the Great Spirit "Sahale" fell in love with her, she could not choose between them. He smote the three lovers and erected a mighty mountain peak where each fell.Helens, as painted by Canadian artist Paul Kane following a visit to the volcano in 1847 (Photograph courtesy of the Royal Ontario Museum). The two braves, Wyeast and Klickitat fought over her, burying villages and forests in the process ( hurling rocks as they erupted? Because Loowit was beautiful, her mountain (Mount St. Helens began to grow before the last major glaciation of the Ice Age had ended about 10,000 years ago.

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Some Indians of the Pacific Northwest variously called Mount St.

Helens not as a menace, but as a serene, beautiful mountain playground teeming with wildlife and available for leisure activities throughout the year. A forerunner of Spirit Lake was born about 3,500 years ago, or possibly earlier, when eruption debris formed a natural dam across the valley of the North Fork of the Toutle River.

At the base of the volcano's northern flank, Spirit Lake, with its clear, refreshing water and wooded shores, was especially popular as a recreational area for hiking, camping, fishing, swimming and boating. Helens region was shattered in the spring of 1980, however, when the volcano stirred from its long repose, shook, swelled, and exploded back to life. The most recent of the pre-1980 eruptive periods began about A. 1800 with an explosive eruption, followed by several additional minor explosions and extrusions of lava, and ended with the formation of the Goat Rocks lava dome by 1857. Helens is the youngest of the major Cascade volcanoes, in the sense that its visible cone was entirely formed during the past 2,200 years, well after the melting of the last of the Ice Age glaciers about 10,000 years ago. Helens' smooth, symmetrical slopes are little affected by erosion as compared with its older, more glacially scarred neighbors--Mount Rainier and Mount Adams in Washington, and Mount Hood in Oregon.

The drawing above the photograph illustrates, in a highy exaggerated fashion, the nearly horizontal movement--about 85 feet in 20 days--of one of the measured points on the "bulge."Through April 21, Mount St.

Helens intermittently ejected ash and steam in bursts lasting from a few seconds to several tens of minutes.

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