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.
Nitro cars sport an 8.2-liter (500 cubic inch) V8, which is slightly smaller than the current Dodge Viper 8.4-liter V10's displacement. However, where a Viper averages around 76 hp/liter, a Nitro car pumps out 1200 hp/liter, thanks to a 14-71 roots-type blower pressurizing the motor to 65 PSI. That's about 30% more power than a Nascar or Formula 1 engine...umâ¦per cylinder (but the aforementioned cars will take it in the twisties).