January 6, 2012
This view of the canyon reveals the layers of limestones and sandstones that testify to vanished seas and deserts. Note the strong, narrow white layer of Coconino Sandstone near the top, composed of 260-million year-old sand dunes. Also note in the center of the photo the 500-foot-tall cliff of Redwall Limestone formed on a seabottom 300-400 million years ago.
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Daily events focus on geology
Grand Canyon, Ariz. – Grand Canyon National Park invites the public to celebrate Earth Science Week (ESW) and National Fossil Day festivities during the week of October 11-17, 2015.
Lodge shuts Oct. 16 -- unless snows close it first
North Rim operations will begin seasonal shut-down of most visitor services on Friday, October 16. The North Rim will remain open to visitors, closing for winter on Tuesday, December 1 or until snow closes State Highway 67 leading into the park.
Starting September 26 the Desert View Watchtower will again host a cultural demonstrator series. The series provides park visitors the opportunity to interact with members of Grand Canyon National Park’s Traditionally Associated Tribes and for the artisans to share their history and crafts. The demonstrations are possible with grants from Grand Canyon Association and ArtPlace America.
I took a step — a long step — a million years step. Then I stopped, turned and faced north. Perched on the jagged edge of my life, I looked down deep into the shadowed layers of lost worlds — terrible deaths, fractured continents, vanished seas, mass extinctions. Taking a breath, I took another step — a long step — another million years. Curiously, I felt better — my troubles for the moment shrunk to no more than a ledge of Tapeats Sandstone in the wall of the Grand Canyon opposite. A layer of fossilized beach sand laid down 570 million years ago, the Tapeats Sandstone lies atop a mystery of missing stone — dubbed the “Great Unconformity.”