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| The astronaut photographs ISS047-E-106206 — ISS047-E-106225 in this mosaic were acquired on May 7, 2016, with a Nikon D4 digital camera using a 800 millimeter lens, and are provided by the ISS Crew Earth Observations Facility and the Earth Science and Remote Sensing Unit, Johnson Space Center. The images were taken by a member of the Expedition 47 crew. The images have been cropped and enhanced to improve contrast, and lens artifacts have been removed. The International Space Station Program supports the laboratory as part of the ISS National Lab to help astronauts take pictures of Earth that will be of the greatest value to scientists and the public, and to make those images freely available on the Internet. Additional images taken by astronauts and cosmonauts can be viewed at the NASA/JSC Gateway to Astronaut Photography of Earth. Caption by Adam Voiland. https://earthobservatory.nasa.gov/IOTD/view.php?id=88922 |
NASA Earth Observatory: A Curious Ensemble of Wonderful Features (October 16, 2016):
https://earthobservatory.nasa.gov/IOTD/view.php?id=88922
When John Wesley Powell explored the Colorado River in 1869, he made the first thorough survey of one of the last blank spots on the map. The expedition began in May at Green River, Wyoming, and ended three months later at the confluence of the Colorado and Virgin Rivers in present-day Nevada.
About two months into their journey, the nine men of the expedition found themselves in Glen Canyon. As the men traveled along the serpentine river channel, they encountered what Powell later described in Canyons of Colorado as a “curious ensemble of wonderful features.”
While the walls were not nearly as high in Glen Canyon as they were downstream in Marble Canyon or Grand Canyon, the explorers encountered a labyrinth of overhanging cliffs, hanging gardens, sweeping river bends, and natural arches set amidst a backdrop of colorful buttes and mesas.
“Past these towering monuments, past these mounded billows of orange sandstone, past these oak-set glens, past these fern-decked alcoves, past these mural curves, we glide hour after hour, stopping now and then, as our attention is arrested by some new wonder,” wrote Powell.
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References and Further Reading
- ArcGIS (2015, September 2) Glen Canyon Historic Photos. Accessed October 14, 2016.
- Glen Canyon Institute Glen Canyon Photos. Accessed October 14, 2016.
- NASA Earth Observatory (2013, April 20) Exploring the Grand Canyon.
- NASA Earth Observatory Water Level in Lake Powell.
- National Park Service Glen Canyon National Recreation Area. Accessed October 14, 2016.
- National Park Service The Powell Expedition. Accessed October 14, 2016.
- PBS Lost in the Grand Canyon. Accessed October 14, 2016.
- Powell, J. (1895) Canyons of Colorado. Accessed October 14, 2016.
- U.S. Geological Survey (1969) The Colorado River Region and John Wesley Powell. Accessed October 14, 2016.
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| download large (full resolution) mosaic image (63 MB, JPEG, 11280x20492) |
Links
Rubble
Hite Overlook Panorama (July 22, 2016)
www.aflitt.com
NPS - Glen Canyon National Recreation Area
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