Let's get volcanic for the August summer doldrums - at Lassen Volcanic National Park. Lassen actually sits at the southern end of the Cascade range (think Rainier, St. Helens, etc.). Lassen Peak - the largest volcano in the park - may be the biggest and baddest volcano there, but this one is easier to walk to the top of (not that I chose to do it). This cone is a 700 foot high volcanic cone of loose scoria.
Cinder cones are conical hills that form around volcanic vents when lava fragments solidify and accumulate. It holds that 30-35 degree angle because any steeper, and the scoria would just slide off. They think this was created around 1650 - so it's not that old.
Head over to the Central Illinois Calendar blog to get yours.