January 5, 2013
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Digging Blackhawk Slide
One day, back around 15,000 BCE, half a mountain in Southern California broke loose and slid out onto what’s now the Mojave desert. The resulting landform is called the Blackhawk Slide. Here it is: It’s that ripple-covered lobe on the bottom right. According to Robert Sharp’s Geology Underfoot in Southern California, it didn’t just flow… Continue reading