Soul of the Underground , by jean dubuffet , 1959 , abstract , Tachisme style , from the series Texturologies , Brown, Rock, Soil, Geology, Close up, Pattern
A close up of a rock surface. 
 a close up of a rock surface. The surface appears to be made up of many small, irregularly shaped rocks. Some of the rocks are light brown, some are darker brown, and some are lighter brown. There are also some darker brown spots on the surface as well. The rocks are jagged and uneven in size. The image has a black border around it.