Knights of Dol Amroth

I hate those little tufts of plastic that GW put on the end of horses hooves and/or on barding that you are expected to believe have a resemblance to grass.

With these Knights of Dol Amroth I've tried to bury the tufts in rock using Milliput.

I'm unsure about the geology shown in the third shot.

Can rocks thrust themselves up through other rocks?

I might end up painting the mound of rock with 'Brown Earth' and topping that with grass to show rocks jutting out of earth mounds or grassy knolls