Quiz: What is the significance of the Grand Canyon’s unique strati May 8, 2025 by Orin Thorne What is the significance of the Grand Canyon’s unique stratified rock layers? Discover more about Grand Canyon Tours at our home page. A) They provide a geological record that dates back nearly 2 billion years. B) They indicate the presence of ancient volcanoes in the area. C) They are solely composed of sedimentary rock formed by river erosion. D) They demonstrate the effects of recent glacial activity in the canyon. Submit Answer
