RGB-3932.5, Sandstone sample from unknown formation

An ankerite-filled macrofractures cuts along the left-edge of this sample from RGB3932.5. There is a slight zoning visible in the carbonate which may either be chemical or related to a "crack-seal" process. For some reason the grains along the edge of the macrofracture are fairly shattered. The diagenesis in this sample is fairly complex.