Oregon Field Guide

Mt. Hood's Volcanic Past, Warren Falls, Yellow Tuft Alyssum (24x4)

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Mt. Hood's Volcanic Past Mt. Hood is an active volcano with a history of relatively recent eruptions. Warren Falls A man-made waterfall in the Columbia Gorge blocks a natural fall. One man wants to end that. Yellow Tuft Alyssum A new invasive species from Europe has been introduced in the Illinois River valley.