Outside the small hamlet of Tionesta, California lie an area of north-south trending cracks within the pumice desert landscape, tension cracks formed during active volcanism from the nearby Medicine Lake Volcano.  These cracks run less than several hundred feet in length yet are fairly deep, up to 40 feet down, sections having old trash & rusted cans below.  Most are narrow & have broken rock, yet are similar in formation to the more well-known Crack-in-the-Ground in the Oregon Outback.