Boundary Boulders
NASA/JPL-Caltech/UArizona
Boundary Boulders
ESP_071923_2260  Science Theme: Geologic Contacts/Stratigraphy
On this part of Mars there is an extensive surface brightness (albedo) boundary. One hypothesis is that this boundary marks a shoreline, from a time long ago when liquid water could have been stable on the surface of Mars.

With the resolution of HiRISE we can see that the reason one side of the boundary is darker than the other is due to the many boulders strewn across the darker side.

Written by: Candy Hansen (narration: Tre Gibbs)  (16 February 2022)

This is a stereo pair with ESP_071699_2260.
 
Acquisition date
29 November 2021

Local Mars time
15:16

Latitude (centered)
45.426°

Longitude (East)
13.806°

Spacecraft altitude
301.5 km (187.4 miles)

Original image scale range
64.8 cm/pixel (with 2 x 2 binning) so objects ~194 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
22.3°

Phase angle
71.3°

Solar incidence angle
49°, with the Sun about 41° above the horizon

Solar longitude
134.4°, Northern Summer

For non-map projected images
North azimuth:  98°
Sub-solar azimuth:  349.4°
JPEG
Black and white
map projected  non-map

IRB color
map projected  non-map

Merged IRB
map projected

Merged RGB
map projected

RGB color
non-map projected

JP2
Black and white
map-projected   (217MB)

IRB color
map-projected   (122MB)

JP2 EXTRAS
Black and white
map-projected  (99MB)
non-map           (99MB)

IRB color
map projected  (37MB)
non-map           (85MB)

Merged IRB
map projected  (222MB)

Merged RGB
map-projected  (206MB)

RGB color
non map           (80MB)
ANAGLYPHS
Map-projected, reduced-resolution
Full resolution JP2 download
Anaglyph details page

BONUS
4K (TIFF)
8K (TIFF)
10K (TIFF)

ADDITIONAL INFORMATION
B&W label
Color label
Merged IRB label
Merged RGB label
EDR products
HiView

NB
IRB: infrared-red-blue
RGB: red-green-blue
About color products (PDF)

Black & white is 5 km across; enhanced color about 1 km
For scale, use JPEG/JP2 black & white map-projected images

USAGE POLICY
All of the images produced by HiRISE and accessible on this site are within the public domain: there are no restrictions on their usage by anyone in the public, including news or science organizations. We do ask for a credit line where possible:
NASA/JPL-Caltech/UArizona

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.