Hints of an Ancient Shoreline in Southern Isidis Planitia
Hints of an Ancient Shoreline in Southern Isidis Planitia
ESP_033242_1845  Science Theme: Geologic Contacts/Stratigraphy
This area—known as the Deuteronilus contact of the Isidis Basin—has been interpreted as a possible ancient shoreline. There are also suggestions that this contact is of volcanic origin.

One direct benefit of a high resolution image is the ability to monitor the detailed morphology of the contact to help to determine whether this formation is the result of an ocean or of a volcanic filling of the Isidis Basin.

Written by: HiRISE Science Team  (6 November 2013)
Acquisition date
29 August 2013

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
273.4 km (169.9 miles)

Original image scale range
55.1 cm/pixel (with 2 x 2 binning) so objects ~165 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection

Emission angle

Phase angle

Solar incidence angle
37°, with the Sun about 53° above the horizon

Solar longitude
14.2°, Northern Spring

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  10.3°
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

Black and white
map-projected   (237MB)

IRB color
map-projected   (126MB)

Black and white
map-projected  (107MB)
non-map           (135MB)

IRB color
map projected  (45MB)
non-map           (140MB)

Merged IRB
map projected  (281MB)

Merged RGB
map-projected  (260MB)

RGB color
non map           (132MB)
B&W label
Color label
Merged IRB label
Merged RGB label
EDR products

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

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/University of Arizona

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.