Ring of Cratered Cones
NASA/JPL/UArizona
Ring of Cratered Cones
ESP_035098_2065  Science Theme: Volcanic Processes
In the center of this observation, we see a ring of cones that have developed over a crater rim. Lava appears to have deflated around and within the ring.

Interestingly, the area around the ring has few cones: did water or steam flow to the crater and make that zone less fertile? These cones are likely "rootless cones," so named because they do not form as a result of direct magma supply, but from the interaction of lava and water or ice in the substrate. The rootless cones in this image may have formed around the crater rim because the lava was thin there.



Written by: HiRISE Science Team (audio: Tre Gibbs)  (2 April 2014)

This is a stereo pair with ESP_034808_2065.
 
Acquisition date
21 January 2014

Local Mars time
15:00

Latitude (centered)
26.237°

Longitude (East)
170.705°

Spacecraft altitude
290.1 km (180.3 miles)

Original image scale range
31.6 cm/pixel (with 1 x 1 binning) so objects ~95 cm across are resolved

Map projected scale
25 cm/pixel and North is up

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Equirectangular

Emission angle
24.3°

Phase angle
64.1°

Solar incidence angle
40°, with the Sun about 50° above the horizon

Solar longitude
79.1°, Northern Spring

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North azimuth:  97°
Sub-solar azimuth:  16.3°
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POSTSCRIPT
NASA’s Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, Calif., manages the Mars Reconnaissance Orbiter for NASA’s Science Mission Directorate, Washington. The HiRISE camera was built by Ball Aerospace and Technology Corporation and is operated by the University of Arizona.