sol 110 RAC 3D ( colorized ) of soil in the sco...

sol 110 RAC 3D ( colorized ) of soil in the scoop:

with links back to a focus zoom animation.

Don't stare at this too long. You might see:

a longish, thin white linear feature connecting a semi-circular reddish feature surrounded by a ring of small, dark spots.

If you really, really stare at the zoom animation you may see numerous other interconnected circular structures in the soil.

Some of this stuff is in the 1 mm range, so it may have made it through the screens.