https://joy.videvo.net/videvo_files/video/free/video0430/large_watermarked/_California%20Joshua%20Tree%20National%20Park%20rounded%20rocks_preview.mp4 Joshua Tree National Park California rounded rocks Erosion has rounded the forms of granite boulders. blueboulderscaliforniadaydesertgeologygranitejoshua treelandscapemojavenational parkpilesrockssceneryskysunnyview