Pictures exactly like those, down to the coulor, could be taken in many places along the Fundy shore in Nova Scotia, and I have hauled slabs back up the hill, and some made it into the house:)
And in very closely related or the same ?, rocks are fossils,lots and lots of fossils, of which I also have hauled back chunks and slabs.,..
I never bothered to study the exact relationship between stratification layers
......but I will now !
edit: the wave ripples I find are sometimes very clear, and what makes it more interesting is that litteraly within several hundred feet, are exactly the same ripples in the modern beach, and they are created at the same scale, and larger, and in high current areas with very fine sand, get large, large and dangerous to walk through as there is quick sand in spots....so it will be trapping and burying whatevr gets deposited.
The relavance bieng, that the mars rover is likely in an exceptionaly good spot for looking for fosils on any scale.