Volcanic rocks often have a vesicular texture caused by voids left by volatiles trapped in the molten lava. Pumice is a highly vesicular rock produced in explosive volcanic eruptions.
The Dodge Nitro is available as a sport utility. Inventory prices for the 2011 Nitro range from $6,585 to $16,609. It gets EPA-estimated 18-19 MPG combined.
Jeep History. New Jeep models include crossovers, Jeeps and SUVs starting at $15,995. Jeep prices for the well-known Jeep Wrangler start at $21,915. The Wrangler also comes in a larger Unlimited trim which starts at $24,160. Now part of Chrysler Group LLC, Jeep is the oldest off-road vehicle brand thanks to its 70 years of legendary heritage.