Mount Etna than fiery, associations, before her incorporation into the folklore of Sicily. For another Sicilian conception of the fairy realm or castle of Morgan le Fay – see Fata Morgana (mirage) re. an optical phenomenon common in the Strait of Messina. Volcanic activity first took place at Etna about 500,000 years ago, with eruptions occurring beneath the sea off the ancient coastline of Sicily. About 300,000 years ago, volcanism began occurring to the southwest of the summit (centre top of volcano) then, before activity moved towards the present centre 170,000 years ago. Eruptions at this time built up the first major
Etna (sternwheeler) of "Etna" was substantially affected by the rise and fall of river levels, which were generally seasonal. Small craft like "Etna" on the Columbia River system were sometimes referred to at the time as the "mosquito fleet" "Etna" was built in Portland, Oregon in 1906 for Horace Campbell by the Portland shipyard of Joseph Supple. Campbell was a steamboat engineer with extensive experience on the Lewis and Lake rivers. "Etna" was exclusive of the extension of the deck over the stern, called the fantail, on which the stern-wheel was mounted. "Etna" had a beam of exclusive of the protective timbers