Final peer reviewed version of https://mastodon.social/@sharponlooker/112877540889721765
Vaughan et al: "The Boulder-Rich Blocky Unit of the Western Jezero Upper Fan: Discriminating Olivine and Pyroxene Compositions and Constraining Provenance"
https://doi.org/10.1029/2025JE009159
@sharponlooker
We've seen that paper before, haven't we?
Jezero Mons being a volcano also nicely explains the #crackedRocks that look like lava bombs: they may actually BE #lavaBombs.
@sharponlooker
Here are #crackedRocks Oli and Dusty a few meters west of #Perseverance and all of them just west of Belva Crater.
On the map, the green area is the field-of-view of MCZ at 34mm.
Processed, leveled MCZ_LEFT, FL: 34mm
looking W (267°) from RMC 39.1170
Sol 812, LMST: 10:19:24
Original: https://mars.nasa.gov/mars2020-raw-images/pub/ods/surface/sol/00812/ids/edr/browse/zcam/ZL0_0812_0739017260_428EBY_N0391170ZCAM03671_0340LMJ01.png
Credit: #NASA/JPL-Caltech/ASU/65dBnoise
PERSEVERANCE 902 © NASA/JPL-Caltech/MSSS/ASU/NeV-T Gigapan - http://gigapan.com/gigapans/233334 GIGAmacro - https://viewer.gigamacro.com/view/LQqbT7nrKGa8EMyO?x1=20580.50&y1=-6449.00&res1=21.44&rot1=0.00 Flickr - https://www.flickr.com/photos/nev-t/ Raw Images - https://mars.nasa.gov/mars2020/multimedia/raw-images/?order=sol+desc%2Cinstrument_sort+asc%2Csample_type_sort+asc%2C+date_taken+desc&per_page=50&page=0&mission=msl&begin_sol=0902&end_sol=0902 Fa...
110mm close-up of 'A rock with a lid'
Processed, cropped MCZ_LEFT, FL: 110mm
Sol: 889, RMC: 44.0000, LMST: 14:06:49
Original: https://mars.nasa.gov/mars2020-raw-images/pub/ods/surface/sol/00889/ids/edr/browse/zcam/ZL0_0889_0745866924_707EBY_N0440000ZCAM08895_1100LMJ01.png
Credit: #NASA/JPL-Caltech/ASU/65dBnoise
A rock with a lid.
Variations on a theme: #crackedRocks
Animated zoom
Processed MCZ_LEFT, FL: 63mm
Sol: 888, RMC: 44.0000, LMST: 11:43:53
Original: https://mars.nasa.gov/mars2020-raw-images/pub/ods/surface/sol/00888/ids/edr/browse/zcam/ZL0_0888_0745769276_832EBY_N0440000ZCAM03742_0630LMJ01.png
Credit: #NASA/JPL-Caltech/ASU/65dBnoise
@mightyspaceman
Thermal stress would be a common cause considering Jezero has a ~60°C temperature swing from day to night. But IANAG™, so, let's wait and see that the geologists will have to say.
Meanwhile, I have a collection of other tagged #crackedRocks seen around Jezero Crater.
IANAG™ = I Am Not A Geologist 🙂
Mars.
Processed, leveled, cropped MCZ_LEFT, FL: 110mm
Sol: 880, RMC: 43.0000, LMST: 12:07:17
Original: https://mars.nasa.gov/mars2020-raw-images/pub/ods/surface/sol/00880/ids/edr/browse/zcam/ZL0_0880_0745060589_769EBY_N0430000ZCAM08882_1100LMJ01.png
Credit: #NASA/JPL-Caltech/ASU/65dBnoise
Variations on a theme: #crackedRocks
Zoom animation
Processed MCZ_RIGHT, FL: 34mm
Sol: 789, RMC: 39.0926, LMST: 12:21:22
Original: https://mars.nasa.gov/mars2020-raw-images/pub/ods/surface/sol/00789/ids/edr/browse/zcam/ZR0_0789_0736982974_113EBY_N0390926ZCAM08808_0340LMJ01.png
Credit: #NASA/JPL-Caltech/ASU/65dBnoise
Cracked open rocks. We've seen them all over the Jezero delta. One day we may learn how they came to be here.
For a bunch of similar #crackedRocks, ⬅️ visit that hashtag 🙂
Zoom animation.
De-bayered, processed, rotated for straight horizon MCZ_RIGHT, FL: 34mm
Sol: 789, RMC: 39.0926, LMST: 12:05:30
Original: https://mars.nasa.gov/mars2020-raw-images/pub/ods/surface/sol/00789/ids/edr/browse/zcam/ZR0_0789_0736981995_113ECM_N0390926ZCAM08808_0340LMJ01.png
Credit: #NASA/JPL-Caltech/ASU/65dBnoise
#Perseverance #Mars2020 #Solarocks #Space #TheStraightHorizonPolice
V Martín
65dBnoise