MSL: Tiny Crystal Shapes Get Close Look from Mars Rover

Find out the latest thinking about our universe.
User avatar
bystander
Apathetic Retiree
Posts: 17529
Joined: Mon Aug 28, 2006 2:06 pm
Location: Oklahoma

MSL: Tiny Crystal Shapes Get Close Look from Mars Rover

Post by bystander » Sun Feb 11, 2018 7:42 pm

Tiny Crystal Shapes Get Close Look from Mars Rover
NASA | JPL-Caltech | MSL Curiosity | 2018 Feb 08
Star-shaped and swallowtail-shaped tiny, dark bumps in fine-layered bright bedrock of a Martian ridge are drawing close inspection by NASA's Curiosity Mars rover.

This set of shapes looks familiar to geologists who have studied gypsum crystals formed in drying lakes on Earth, but Curiosity's science team is considering multiple possibilities for the origin of these features on "Vera Rubin Ridge" on Mars.

One uncertainty the rover's inspection may resolve is the timing of when the crystal-shaped features formed, relative to when layers of sediment accumulated around them. Another is whether the original mineral that crystallized into these shapes remains in them or was subsequently dissolved away and replaced by something else. Answers may point to evidence of a drying lake or to groundwater that flowed through the sediment after it became cemented into rock.

The rover team also is investigating other clues on the same area to learn more about the Red Planet's history. These include stick-shaped features the size of rice grains, mineral veins with both bright and dark zones, color variations in the bedrock, smoothly horizontal laminations that vary more than tenfold in thickness of individual layers, and more than fourfold variation in the iron content of local rock targets examined by the rover. ...
Know the quiet place within your heart and touch the rainbow of possibility; be
alive to the gentle breeze of communication, and please stop being such a jerk.
— Garrison Keillor

User avatar
neufer
Vacationer at Tralfamadore
Posts: 15345
Joined: Mon Jan 21, 2008 1:57 pm
Location: Alexandria, Virginia

Re: MSL: Tiny Crystal Shapes Get Close Look from Mars Rover

Post by neufer » Tue Mar 06, 2018 2:19 pm

Click to play embedded YouTube video.
Click to play embedded YouTube video.
Click to play embedded YouTube video.
Art Neuendorffer