downtown city skylines, some images similar to bird’s eye views of Manhattan island. circumference edge reminiscent of coast line, cut surface flat plains, mountains, sandstone buttes. Sundial effect: Time of day and position of tree indicated by shadow from perpendicular splinters. 10.00 a.m. Type, age and condition of tree visible. Some stumps have the appearance of geological forms, however, most resemble a built architectural environment.