Earth Sciences and Image Analysis Debriefing with Crewmembers, 19 June, 2000

STS-101 Earth Sciences and Image Analysis Debriefing with Crewmembers
June 19, 2000

LAKE CHAD AND THE SAHARA

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STS101-712-32 Lake Chad basin oblique looking ENE.

STS041-76-1 Lake Chad, October 1990.

STS101-723-48 Lake Chad comparison.

STS101-706-10 Probably the first photograph of its kind in our database! Two impact craters, Aorounga and Gweni Fada, in one view. Scientists have requested images from space of Gweni Fada.

STS101-706-6 Aorounga impact in Chad. Although suspected of being an impact for some time, its remoteness did now allow for confirmation until 1992. The crater is 12.6 km in diameter and is less than 345 million years old.

STS101-707-27 Karakul Lake in the Pamir Mountains, Tajikistan, has partially filled an impact crater. The original crater diameter was 45 kilometers (the lake is 25 km across) and it has been dated at less than 10 million years. We have few photographs of this crater lake in our database collection.

STS101-701-33 Richat Structure in Mauritania. Although this structure looks like an impact crater it is not. Uplift and erosion of sedimentary rocks are probably responsibile for the circular nature of this feature. Richat is 38 km in diameter.

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Recommended Citation: Image Science and Analysis Laboratory, NASA-Johnson Space Center. "The Gateway to Astronaut Photography of Earth." .

NASA Responsible Official: Tracy Calhoun

Curator: jsc-earthweb@mail.nasa.gov

Contributors: Earth Sciences Web Team

National Aeronautics and Space Administration

Lyndon B. Johnson Space Center

International Space Station National Laboratory

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STS101-712-32	Lake Chad basin oblique looking ENE.
STS041-76-1	Lake Chad, October 1990.
STS101-723-48	Lake Chad comparison.
STS101-706-10	Probably the first photograph of its kind in our database! Two impact craters, Aorounga and Gweni Fada, in one view. Scientists have requested images from space of Gweni Fada.
STS101-706-6	Aorounga impact in Chad. Although suspected of being an impact for some time, its remoteness did now allow for confirmation until 1992. The crater is 12.6 km in diameter and is less than 345 million years old.
STS101-707-27	Karakul Lake in the Pamir Mountains, Tajikistan, has partially filled an impact crater. The original crater diameter was 45 kilometers (the lake is 25 km across) and it has been dated at less than 10 million years. We have few photographs of this crater lake in our database collection.
STS101-701-33	Richat Structure in Mauritania. Although this structure looks like an impact crater it is not. Uplift and erosion of sedimentary rocks are probably responsibile for the circular nature of this feature. Richat is 38 km in diameter.

This service is provided by the International Space Station program and the JSC Astromaterials Research & Exploration Science Directorate. Recommended Citation: Image Science and Analysis Laboratory, NASA-Johnson Space Center. "The Gateway to Astronaut Photography of Earth." .
	NASA Responsible Official: Tracy Calhoun Curator: jsc-earthweb@mail.nasa.gov Contributors: Earth Sciences Web Team	National Aeronautics and Space Administration Lyndon B. Johnson Space Center	International Space Station National Laboratory Last Update:
Server: 1