Photographer: Jeff Cuneo Summary Author: Jeff Cuneo The photo above showing a petrified log (petrified wood member) was captured near the western border of Zion National Park, Utah. Gravel and pebbles that form the Shinarump conglomerate flowed over this area during huge flood events in the Triassic Period. Trees (mostly conifers) were also washed downstream, and many eventually became fossilized within the conglomerate. Over time silica and mineral deposits replaced the cellulose in the wood. Photo taken in late October 2018.
Photo Details: Camera: Canon EOS 80D; Exposure Time: 0.017; ISO: 125; Shutter Speed: 1/64 sec; F-stop: F/5.7; FocalLength : 18.
Zion National Park, Utah Coordinates: 37.2982, -113.0263Related Links
Petrified Forest of Northern Arizona
Petrified Wood: Legacy from a Late Triassic Landscape
Student Links
Worksheet: The fossilization process
Earth Observatory
Zion National Park
