Twin Craters in Meridiani Planum
NASA/JPL/University of Arizona
Twin Craters in Meridiani Planum
ESP_050849_1700  Science Theme: Mass Wasting Processes
twitter  •  tumblr

HICLIP
1080p (MP4)
Audio (MP3)

WALLPAPER
800
1024
1152
1280
1440
1600
1920
2048
2560
2736
2880
4500
4K
8K
10K

HIFLYER
PDF (11 x 17)

HISLIDES
PowerPoint
Keynote
PDF

This image shows two small impact craters located in Meridiani Planum. This is an example of the geologic principle of superposition: figuring out what happened first by looking at how features interact with each other. We can see that one of the craters must have hit the surface after the other was already there, but which came first?

We can see that the ejecta blankets look rougher on the right side of the image than they do on the left. This could mean that the right side ejecta is newer, and hasn’t been exposed to the wind as much as the left side has.

Zooming in, we see small boulders on the floor and walls of the left-side crater, and they even seem to match the rough material in the ejecta on the right. With these clues, we can hypothesize that the crater on the left was here first. After some time another asteroid hit, formed the crater on the right, which threw material onto the floor of the left, where it remains to this day.

Written by: Nicole Bardabelias (audio: Tre Gibbs)  (14 May 2018)

This is a stereo pair with ESP_050704_1700.
 
Acquisition date
01 June 2017

Local Mars time
14:16

Latitude (centered)
-9.882°

Longitude (East)
6.860°

Spacecraft altitude
264.4 km (164.3 miles)

Original image scale range
27.4 cm/pixel (with 1 x 1 binning) so objects ~82 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
16.0°

Phase angle
52.0°

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

Solar longitude
13.3°, Northern Spring

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  29.4°
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   (495MB)

IRB color
map-projected   (281MB)

JP2 EXTRAS
Black and white
map-projected  (216MB)
non-map           (260MB)

IRB color
map projected  (72MB)
non-map           (220MB)

Merged IRB
map projected  (132MB)

Merged RGB
map-projected  (125MB)

RGB color
non map           (218MB)
ANAGLYPHS
Map-projected, reduced-resolution
Full resolution JP2 download
Anaglyph details page

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/University of Arizona

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.