Concrete, smooth stone or stucco, and metal exterior surfaces with accents of glass, terra-cotta, colored mirrors, and mosaic tile are common materials, usually applied to simple, symmetrical geometric forms. Decorative motifs consist of low-relief geometrical designs in the form of parallel straight lines, zigzags, chevrons, and stylized floral motifs based upon native American Indian Art.
Vertical emphasis is provided by towers, pilasters, and strips of windows with decorative spandrels.
Even smaller structures often feature the stepped or set-back facade originally found on skyscrapers.