EOSDIS
Data Distinguish Geologic Features
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.
Terra MODIS - Moderate-Resolution
Imaging Spectroradiometer
The natural color image gives a synoptic view (an area covered by ±
16 Landsat scenes) 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 (ergs), and Pleistocene lake deposits
and river canyons. The Tassil N'Ajjer National Park of Algeria (left half
of image) is famous for its geology, fauna, and ancient cave paintings.
Image
courtesy of Luca Pietranera, Telespazio, Rome, Italy
Reference: http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=4900
Scene ID: SC:MOD021KM.001:810996. Data acquired August 25, 2000
Data Set: MODIS/TERRA CALIBRATED RADIANCES 5-MIN L1B SWATH 1KM V001
Terra ASTER - Advanced
Spaceborne Thermal Emission and Reflection Radiometer
The subset image shows a very clear view of 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 (world's largest copper mine, at Chuquicamata, and El Tatio
Geysers are in the vicinity). The geologic section is exposed by erosion
from the east.
Image courtesy of
the NASA/GSFC/MITI/ERSDAC/JAROS, and U.S./Japan ASTER Team
Reference: http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=4792
Scene ID: SC:AST_L1B.002:2002270252. Data acquired April 7, 2000
Data Set: ASTER LEVEL 1B DATA SET REGISTERED RADIANCE AT THE SENSOR V002
Landsat 7
ETM+ - Enhanced Thematic Mapper Plus
The true color and anaglyph images show the Haro Hills Anticline of India's
Katch region. The anticline is related to crustal compression as India
drifted into Asia and, perhaps, is related to the major earthquake of
January 26, 2001. Also shown is a volcanic dike separating the contrasting
geologic structures of Kas Hills and Haro Hills.
Image courtesy of
the Landsat Science Team
Reference: http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=4821
Image Annotation: Information from report by Seeber, et al. See http://neotectonics.seismo.unr.edu/Bhuj/Report.html
Data Granule ID: SC:L70RWRS.002:2002430646. Data acquired February 9,
2001
Data Set: LANDSAT-7 LEVEL_OR WRS_SCENE DATA V002
Terra MISR - Multi-angle
Imaging Spectroradiometer
True color and anaglyph [3-D red and blue lenses from AN (nadir) and
BF (45.6-degree forward) cameras] images show 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. (Note that north is to the left). Mono Lake
is visible near the center of the image, with Lake Tahoe to the north
and Walker Lake to the east.
Image courtesy of
the NASA/GSFC/JPL, MISR Science Team
Reference: http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=4281
Data Granule ID: SC:MI1B2E.001:357288. Data acquired August 12, 2000
Data Set: MISR LEVEL 1B2 ELLIPSOID DATA V001
For information about
the NASA EOS missions and instruments, see http://eos.nasa.gov.
For information about the data centers that distribute EOSDIS data, see
the DAAC Alliance Web site at http://nasadaacs.eos.nasa.gov.
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