Thinking about scaling some rock faces in the National Parks this season? Well. there are some lesser known US national park ...

On the April 11 episode of the Best of Rock Chalk Sports Talk Podcast from KLWN, Daniel Courtwright and Sean Kellerman share ...

For example: The soft rock is made of clay and sands, and the hard rock is chalk and limestone. As erosion processes take place, the clay erodes away quicker than the limestone and chalk.