Found: Man-Made Pavements on Mars

Mars rover Curiosity imaged the following cross-bedding (notes 1, 2) at Shaler on Sol 307 and Sol 120.

However, the cross-bedding looks more like flat, thin, and smooth pavements constructed by Martians:

http://www.wretch.cc/album/show.php?i=lin440315&b=20&f=1556862996&p=431

http://www.wretch.cc/album/show.php?i=lin440315&b=20&f=1556862998&p=432

Image sources: http://www.flickr.com/photos/84750994@N05/9160175660/sizes/k/

http://mars.jpl.nasa.gov/msl/images/pia16550-Fig1_Shaler-Mastcam-whitebalanced-scalebar-br.jpg

Note 1: Wikipedia article on cross-bedding http://en.wikipedia.org/wiki/Cross-bedding

Note 2: NASA’s press release http://mars.jpl.nasa.gov/msl/multimedia/images/?ImageID=4937

Added on June 30: High resolution images of “cross-beds” at Shaler

http://gigapan.com/gigapans/133212

http://gigapan.com/gigapans/133279

http://gigapan.com/gigapans/133323

http://www.wretch.cc/album/show.php?i=lin440315&b=20&f=1556671244&p=295&sp=0

Added on July 1: Why they are not cross-beds.

No cross-beds and no rocks on Earth look like those on Mars. The “cross-beds” are actually man-made pavement. The pavement broke and sank to lower positions as marked in http://www.wretch.cc/album/show.php?i=lin440315&b=20&f=1556868278&p=435

Added on July 1: Labeled remains of pavement built by Martians.

Labelled in the following photos are high resolution images of specific remains of man-made pavement found at Shaler, Mars: http://www.wretch.cc/album/show.php?i=lin440315&b=20&f=1556868279&p=436

http://www.wretch.cc/album/show.php?i=lin440315&b=20&f=1556671244&p=295

Image sources: central area of http://gigapan.com/gigapans/133212 
http://mars.jpl.nasa.gov/msl/multimedia/images/?ImageID=5027

Added on July 2: Definition of Pavement–http://www.merriam-webster.com/dictionary/pavement
Quote from the link: “Rigid pavements are made of concrete, composed of coarse and fine aggregate and portland cement, and usually reinforced with steel rod or mesh.”