Explosive materials commonly used in mining or excavation work have been discovered at Lake Roosevelt National Recreation Area in Washington state, though authorities don't think there's a risk to the public.
Lake Roosevelt National Recreation Area in Washington State has experienced several impressive waves caused by large landslides on the adjacent shoreline. The latest occurred last week, when a slide-triggered wave damaged shoreline facilities at a park campground.
What some media reports have referred to as an "inland tsunami" occurred on January 16, 2009, at Lake Roosevelt National Recreation Area —and this impressive wave was not the first of its kind at the lake.
This week’s quiz deals with rivers flowing within or through the national parks. Answers are at the end. If we catch you peeking, we’ll make you write “Tributaries joining main streams at right angles is a signature feature of trellis drainage” 100 times on the whiteboard.