Astronaut photograph ISS025-E-6163 was acquired on October 6, 2010, with a Nikon D2Xs digital camera using a 180 mm lens, and is provided by the ISS Crew Earth Observations experiment and Image Science & Analysis Laboratory, Johnson Space Center. The image was taken by the Expedition 25 crew. The image in this article has been cropped and enhanced to improve contrast. 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 William L. Stefanov, NASA-JSC.
Nevado (“snowy” or “snowy peak” in Spanish) Coropuna is the highest volcanic peak in Peru; the summit elevation is 6,377 meters (20,900 feet) above sea level. Rather than being a single stratovolcano, Coropuna is a complex of numerous summit cones. The complex covers an area of 240 square kilometers (92.6 square miles) within the Ampato mountain range (Cordillera Ampato) in southeast-central Peru. While the exact date of the volcano’s last eruption is not known, lava flows along the northern, southern, and western flanks are thought to have been placed during the early Holocene Epoch—the current geologic time, which began approximately 12,000 years ago.
Coropuna also hosts several summit glaciers and ice fields that contrast sharply with the dark rock outcrops and surface deposits at lower elevations. Glacial deposits and lateral moraines on the flanks of Coropuna indicate that glaciers once extended to much lower elevations than observed today. Careful mapping and surface exposure age-dating of these deposits and landforms provides data on the timing of ice advances and retreats in the tropics near the end of the Pleistocene Epoch (extending from about 2.5 million to 12,000 years ago). This information can be compared with other paleoclimate records to obtain a better understanding of how Earth’s climate has changed over geologic time.
- Bromley, Gordon R.M., et al. (November 2009). Relative timing of last glacial maximum and late-glacial events in the central tropical Andes. Quaternary Science Reviews, Volume 28, Issues 23-24, Pages 2514-2526, ISSN 0277-3791.
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This image originally appeared on the Earth Observatory. Click here to view the full, original record.