Jezero Crater Rim Campaign, Sols 1250- xxxx, 27 Aug 2024-, Exploring the ancient rocks of Jezero crater's rim. Options

[tau]

Sol 1268 Mastcam-Z
- left eye filter 0 (RGB),
- left eye filters 1 to 6 (visible to nearest infrared light) multispectral principal components,
- right eye filters 1 to 6 (infrared light) multispectral principal components

[Floyd]

Wow! Very nicely rounded and the white and dark areas seem to be of same hardness. I don't see any ChemCam images yet. I think with the team having taken full multispectral images they will do ChemCham as well. Might this be another not often seen granite rock? It would be great if any of the geologists reading added a few comments.

[neville thompson]

PERSEVERANCE 1266
© NASA/JPL-Caltech/MSSS/ASU/NeV-T



GIGAPAN -- GIGAMACRO

[neo56]

Panorama taken with NC Left on sol 1268 at 16:00 LMST.

[neville thompson]

PERSEVERANCE 1265
© NASA/JPL-Caltech/MSSS/ASU/NeV-T



GIGAPAN -- GIGAMACRO

[neville thompson]

PERSEVERANCE 1268
© NASA/JPL-Caltech/MSSS/ASU/NeV-T



GIGAPAN -- GIGAMACRO

PERSEVERANCE 1270
© NASA/JPL-Caltech/MSSS/ASU/NeV-T



GIGAPAN -- GIGAMACRO

[serpens]

Wow! Very nicely rounded and the white and dark areas seem to be of same hardness. I don't see any ChemCam images yet. I think with the team having taken full multispectral images they will do ChemCham as well. Might this be another not often seen granite rock? It would be great if any of the geologists reading added a few comments.

The site has become very light on with respect to comment on intriguing images from both rovers. Mars is a basaltic environment so a high probability that the light colored rock is basalt originating upstream, well outside the crater. I wonder whether the erosion resistant rock formed the core of a conglomerate and the dark (enhanced blue) deposits are remnants of the conglomerate matrix. Just seems the simplest solution compared to say the mixing of melts from two different sources. Rare but possible.

[Floyd]

Serpens Thank you for responding. I definitely agree that the forum has become light on comments. There must be graduate students, postdocs, and others who are knowledgable in geology who come regularly to UMSF, but just lurk. I urge you to contribute your thoughts. If a suggested analysis is off, that is OK, it might stimulate someone else, to say I don't think so I think it is more likely something else. For most of the history of the forum, active discussions of the fantastic images we see contributed educated the majority of forum members and visitors who are not experts.

[neville thompson]

PERSEVERANCE 1272
© NASA/JPL-Caltech/MSSS/ASU/NeV-T



GIGAPAN -- GIGAMACRO

[john_s]

Serpens Thank you for responding. I definitely agree that the forum has become light on comments. There must be graduate students, postdocs, and others who are knowledgable in geology who come regularly to UMSF, but just lurk. I urge you to contribute your thoughts. If a suggested analysis is off, that is OK, it might stimulate someone else, to say I don't think so I think it is more likely something else. For most of the history of the forum, active discussions of the fantastic images we see contributed educated the majority of forum members and visitors who are not experts.

Well, I’ll have a go, if only to say I find that rock intriguing and baffling, not like anything I remember seeing on Mars before. Don’t think I buy the conglomerate + matrix idea, as the light and dark components seem too uniformly distributed. But I don’t have a convincing alternative. Maybe a poorly mixed impact melt?? I’m not sure if the rover has moved on, or might still take a closer look.

John

[serpens]

Something of a diagnosis of desperation John, limited to visual assessment of Tau's 'near true colour' image. To me the grey component appears granular and well, somewhat clumpy as opposed to the more smooth light areas. There even seem to be small clasts within the clumps. If it were a meeting or mix of melts I would have thought swirling would feature. But then again the drainage area for this delta, which from the rounding would seem the origin of the rock, encompasses the eroded ejecta blanket from the massive Isidis impact. This should include deep crust and mantle material and post impact there would have been really impressive, long term tectonic activity. So some unusual products could be expected. I guess if they move Perseverance closer then the rock is of importance. If not, they already have it figured out.