Petrified logs from the late Triassic period, 225 million years ago, Long Logs Trail, Petrified Forest National Park, Arizona, United States of America, North America

Petrified logs from the late Triassic period, 225 million years ago, Long Logs Trail, Petrified Forest National Park, Arizona, United States of America, North America

Petrified logs from the late Triassic period, 225 million years ago, Long Logs Trail, Petrified Forest National Park, Arizona, United States of America, North America

Petrified logs from the late Triassic period, 225 million years ago, Long Logs Trail, Petrified Forest National Park, Arizona, United States of America, North America

Petrified logs from the late Triassic period, 225 million years ago, Long Logs Trail, Petrified Forest National Park, Arizona, United States of America, North America

Canada, Alberta, Writing-on-Stone Provincial Park, The hoodoos and the Milk River, The park is sacred to the Blackfoot and other aboriginal tribes and is home to the largest collection of rock art on the North American prairies, Pictographs and Petroglyphs possibly 3,500 years old, Canada has applied for UNESCO World Heritage status for the site.