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The Martian Chronicles

Sols 2416-2418: Drill No Go – time for Plan B!

25 May 2019, 00:00 UTC
Sols 2416-2418: Drill No Go – time for Plan B!
(200 words excerpt, click title or image to see full post)

‘Woodland Bay’ is the elongated, laminated outcrop on the right of this image
At the start of today’s planning, the Geology theme group (GEO) had a major decision to make, whether to drill here at ‘Broad Cairn’ or not. Unfortunately, APXS data indicated that this rock lies just outside of our desired compositional parameters, with lower potassium (K) than we would have liked. This made for a hectic start to planning as we discussed the implications of these results and decided not to drill after all, moving instead to Plan B. We will use this three-sol plan to finish investigating the chemical variability here and then begin the drive back to start a reinvestigation of an earlier target from sol 2359, ‘Woodland Bay,’ around 130 metres away. This is a very interesting laminated rock, with alternating thinner and thicker layers, and it is possible that one of these layers is the source of the pebbles we see strewn about Glen Torridon.
Pre-drive, ChemCam will do some final analysis on the bedrock block here. We will analyze the APXS target Broad Cairn in order to compare results with those from APXS, refine an earlier ChemCam target ‘Hallaig,’ and get a third ...

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