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valley
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Morocco idealized profiles of two hillslopes Central Valles Marineris Ruell Valles dendritic drainage pattern underfit stream cratered plains and cratered highlands in Lunae Planum False-colour oblique view of central Valles Marineris. The eastern edge of Candor Chasma (left) and Ophir Chasma (centre) show evidence of erosional collapse. This picture combines data from high-resolution black-and-white and low-resolution colour images taken by the Viking spacecraft.
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Morocco
valley summary
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Andrew Jackson delivering a speech while on his way to Washington, D.C., for his inauguration in 1829. From Harper's Weekly, 1881.
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Jackson (Wyoming, United States). Jackson Lake (also called Jackson Hole), southern end of the Teton Range (the Grand Tetons), Grand Teton National Park, Wyoming, USA
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Vincent Van Gogh, Self Portrait. Oil on canvas, 1887.
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halloween, jack o lantern, pumpkin, gourd
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A Factory Interior, watercolor, pen and gray ink, graphite, and white goache on wove paper by unknown artist, c. 1871-91; in the Yale Center for British Art. Industrial Revolution England
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Images

Morocco
The rugged Atlas Mountains surround a valley in Morocco.
© Victor Englebert/Science Source
idealized profiles of two hillslopes
Comparison of idealized profiles for weathering-limited, faceted hillslopes (left)...
Encyclopædia Britannica, Inc.
Central Valles Marineris
Central Valles Marineris, one of many valleys on Mars. This false-colour picture...
Photo NASA/JPL/Caltech (NASA photo # PIA 00006)
Ruell Valles
Ruell Valles, a Martian valley or fretted channel. The steep walls of the valley...
Photo NASA/JPL/Caltech (NASA photo # PIA00153)
dendritic drainage pattern
Dendritic drainage pattern developed on flat-lying limestone in central Yemen.
Courtesy of National Aeronautics and Space Administration
underfit stream
Idealized map view of a stream that is underfit in relation to its valley. The contrast...
Encyclopædia Britannica, Inc.
cratered plains and cratered highlands in Lunae Planum
Viking photograph of the cratered plains/cratered highlands in Lunae Planum. The...
Courtesy of the Jet Propulsion Laboratory/National Aeronautics and Space Administration
False-colour oblique view of central Valles Marineris. The eastern edge of Candor...
Photo NASA/JPL/Caltech (NASA photo # PIA00005)
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