MARS: CURIOSITY u krateru GALE

Sols 1194-1195: Driving around “Namib Dune”

14 December 2015


Over the weekend Curiosity drove 42 m closer to “Namib Dune, and the view is pretty spectacular.  We’ve received a lot of beautiful Mastcam and Navcam images, which can be found here.
In today’s 2-sol plan, we’ll continue driving around the “Namib Dune” to get to the lee side.  It was a pretty straightforward day for me as GSTL, and Ken as the MAHLI/MARDI PUL.  On the first sol Curiosity will acquire ChemCam and Mastcam observations of targets named “Karfenkliff” and “Grillental” to characterize some of the local bedrock and veins.  We’ll also take a Mastcam stereo mosaic of “Namib Dune” to better understand the morphology of the ripples and grain flows.  The plan also includes a Mastcam image of the rover deck to monitor the movement of particles.  Then we’ll drive for ~47 m and take post-drive imaging to document the local geology and prepare for targeting in Wednesday’s plan.   On the second sol we’ll perform a number of ChemCam calibration activities and take a Mastcam tau to monitor atmospheric opacity.
By Lauren Edgar
--Lauren is a Research Geologist at the USGS Astrogeology Science Center and a member of MSL science team.

Približna trenutna lokacija...sol 1194

Pijesak slične granulacije ima prirodni kut unutrašnjeg  trenja manji od 15°, što će reći da se iznad toga tla pouše i uspostavi se  novo ravnotežno stanje. Ovo što vidimo na foto iznad je moguće samo ako postoji takozvani kohezivni faktor "c", kojeg možemo vidjeti napr. kod gline. Koehezivni faktor poništi prisustvo vode, kad glina prelazi iz tvrdog u tečno stanje.
Bit će zanimljivo čuti šta kažu geolozi, odnosno geomehanici za fenomen na  gornjem foto...

Ero wrote:Pijesak slične granulacije ima prirodni kut unutrašnjeg  trenja manji od 15°, što će reći da se iznad toga tla pouše i uspostavi se  novo ravnotežno stanje. Ovo što vidimo na foto iznad je moguće samo ako postoji takozvani kohezivni faktor "c", kojeg možemo vidjeti napr. kod gline. Koehezivni faktor poništi prisustvo vode, kad glina prelazi iz tvrdog u tečno stanje.
Bit će zanimljivo čuti šta kažu geolozi, odnosno geomehanici za fenomen na  gornjem foto...

PS:



Ah, da, bila samo iluzija...uopće rub nije vertikalan!

http://phys.org/news/2015-12-mars-rover-higher-silica-considerable.html