Some of the structures exhibit slab-vaulted masonry (indicative of the Early Classic and early Late Classic periods), while many quadrangles contain structures with veneer masonry (introduced at the end of the Late Classic and elaborated during the Terminal Classic period).
Some of these structures display a type of masonry that involves stacked stones (similar to the Early Classic and early Late Classic periods), while many quadrangles contain buildings with layers of plaster applied to the walls (consistent with the Late Classic and Terminal Classic periods).