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Home > Outreach Materials > Posters > Geologists' Tools Poster Image Descriptions |
| Geologists' Tools in Space Poster Description |
| Scientific data products from NASA’s Earth Observing System (EOS) satellites allow observation and analysis of
environmental changes. The images featured on this poster represent only a small sample of the many EOS Data
and Information System (EOSDIS) products useful in studying geologic structures in remote areas.
Three-band composite images show local and regional patterns of rock outcrops, soils, and sediments. Different
minerals in the rocks produce the different colors seen in the images. Additional computer processing can enhance
subtle color differences and produce images in perspective and stereo views. (Note that red-blue glasses allow the
viewer to see the anaglyph images on this poster in three dimensions.) Composite and processed images allow
geologists to map local and regional geology, locate mineral resources, and detect and monitor geologic hazards. Back to poster |
| Central Sahara image |
| The MODIS anaglyph (3-D red and blue lenses) gives a synoptic view of the Sahara Desert
along the southern border between Algeria and Libya. It shows Precambrian plutonic and Paleozoic sandstone outcrops, along with modern
sand seas, and Pleistocene lake deposits and river caTMI Precipitation Water Datanyons Back to poster |
| Landsat 7 ETM+ color image |
| The Landsat-7 ETM+ color image shows
geologic structures of India’s Katch region. The Haro Hills Anticline is related to the crustal compression
resulting from India’s drift into Asia. A volcanic dike separating the contrasting geologic structures of Kas
Hills and Haro Hills is also shown. Back to poster |
| Anaglyph image |
| The Landsat-7 ETM+ anaglyph
(3-D red and blue lenses) shows geologic structures of India’s Katch region. The Haro Hills Anticline
is related to the crustal compression resulting from India’s drift into Asia. A volcanic dike separating
the contrasting geologic structures of Kas Hills and Haro Hills is also shown. Back to poster |
| ASTER image |
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The ASTER false-color image subset shows an angular unconformity of the Altiplano (Atacama Desert) of
Chile. The unconformity is between flat-lying pyroclastic rocks of the Altiplano-Puma volcanic complex
on top of inclined Cretaceous sediments. The pale yellow rocks may represent hydrothermal alteration.
Back to poster |
| MISR Sierras color image |
| The MISR anaglyph natural color image,
oriented with North to the left, shows the central Sierra Nevada Mountains with Yosemite, Sequoia, and Kings Canyon National
Parks; a portion of the Great Valley of California; Owens Valley; and the basins and ranges of California and Nevada. Mono Lake
is visible near the center of the image, with Lake Tahoe to the north and Walker Lake to the east. Back to poster |
| MISR Sierras Anaglyph image |
| The MISR anaglyph
(3-D red and blue lenses), oriented with North to the left, shows the central Sierra Nevada Mountains
with Yosemite, Sequoia, and Kings Canyon National Parks; a portion of the Great Valley of California;
Owens Valley; and the basins and ranges of California and Nevada. Mono Lake is visible near the center
of the image, with Lake Tahoe to the north and Walker Lake to the east. Back to poster |
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