Check the listing for details. Utah Petrified Wood * Rough Stand Up * 10.7 oz.. Listed at 17.00 USD. UTAHPetrified Wood Utah Petrified Wood, found in the Brushy Basin Member in the Morrison Formation. This petrified wood is about 140 million years old from the Jurassic Time Period. The wood from this area is mostly the brown wood with nice shapes and outside wood character. There's also the black wood with red agate and some with red agate fortification. Very cool piece of rough wood with a big orange boytroidal and white, blue and black. Great wood character. Super cool stand up, rare and different specimen. er nice specimens! Measures about: 3 1/4 inches x 1 3/4 inches and 3 inches tall, weighs 10.7 oz. Thank you for looking at our auction today. The rock you receive always look so much nicer than the pictures. Please email with any questions you may have. Check out our store: Petrified Palace for more great rocks! Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.