In a prolific body of work, Garlock captured a wide range of themes including landscapes, highways and waterways, imagery of family and ritual, portraiture, wooden sculptural figures, and vernacular scenes of life.  With an extremely painterly style, Garlock covered entire surfaces of wooden boards, cardboard from department store boxes, and canvases. He used a vigorous palette, ranging from monochromatic illustrations in blacks and grays, to bright vibrant hues of color that vibrate in relation to each other.