One of the most common listener questions I get is people asking and speculating about what is on barges that pass by Astoria with a white powdery substance on board. They want to know what it is and why it doesn’t blow off in the wind. It’s crushed limestone and the reason it stays put has to do with a property of substances that can be gathered in piles: it’s called “angle of repose.”
Podcast: Play in new window
