Gullies and Craters on the Floor of Newton Basin
Gullies and Craters on the Floor of Newton Basin
PSP_002620_1410  Science Theme: Fluvial Processes
This image shows a portion of two impact craters on the floor of Newton Basin where a smaller crater formed within a earlier larger one. The larger crater's north rim can be seen diagonally (southwest-northeast) across the image and the smaller crater's north rim is near the bottom of the image.

Several gullies are incised along the interior wall of the larger crater. These gullies start near the top of the wall and can be traced across a break in slope partway down the wall (see subimage, 750 meters across). This break in slope occurs along the entire portion of the crater wall, and appear shallower just above the break in slope, and deeper below the slope break. This suggests that the fluid which eroded and carved out the wall materials forming the gullies, increased in velocity after the slope break, creating a deeper section.

Written by: Kelly Kolb  (5 July 2007)

This is a stereo pair with PSP_002686_1410.
Acquisition date
16 February 2007

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
252.6 km (157.0 miles)

Original image scale range
25.5 cm/pixel (with 1 x 1 binning) so objects ~77 cm across are resolved

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25 cm/pixel and North is up

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63°, with the Sun about 27° above the horizon

Solar longitude
185.0°, Northern Autumn

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North azimuth:  96°
Sub-solar azimuth:  25.3°
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