Detail of RIVER PATHS AND MOUNTAIN RELICS: stone, exposed-aggregate concrete, 12-block public art design for the Mountain Avenue Bicycle, Pedestrian and Landscape Demonstration Project, Tucson, Arizona, 1990-92. Roger worked on both the design and construction phases of this road improvement project with the design team including Sverdrup Corp. engineers and McGann & Assoc. landscape architects. .   

The sculpture focuses on the geology that surrounds and underlies the city of Tucson. It consists of a meandering exposed-aggregate ribbon of gravels from the local washes inlaid in the sidewalk, accompanied by thirty-five boulder arrangements of a wide variety of local stones, about three sets per block, in the landscaping. Whenever the ribbon passes a stone piece, it does a little dance.

Alternate view of group shown at top: granite boulders, tallest 3 feet high; ribbon is 1 foot wide, sidewalk 4.5 to 5 feet, concrete bike lane seen at right, 6 feet wide. Boulders and smaller stones were grouped according to size, color, texture and shape. Not all are round. Some are fractured and angular. The resulting 35 groups show the wide variety of stone types occurring naturally in the Tucson area.