I see your true colors, and that's why I love you, Mars.💜 The purple hue of this rock indicates hematite below the dust—a telltale sign of Mars’ watery past.
Source: go.nasa.gov
Purple Martian Majesty: Look closely and you’ll see purple and tan bands in this bedrock on Mars.
Source: go.nasa.gov
Layers of meaning! These rocks show the deep and shallow waters of an ancient Martian lake could've supported different kinds of microbes. This evenly layered rock imaged in 2014 by my Mastcam shows a pattern typical of a lake-floor sedimentary deposit near where flowing water entered a lake. Shallow and deep parts of an ancient Martian lake left different clues in mudstone formed from lakebed deposits. Credit: @nasa/NASAJPL-Caltech/MSSS
Source: jpl.nasa.gov
An ancient Martian lake stood where Mount Sharp (Aeolis Mons) is today. The water's source remains a mystery.
Here's the full story: http://go.nasa.gov/1jeB4TP
Frozen in Time: I found what appear to be petrified sand dunes on Mars.
Source: go.nasa.gov