Thin bedded layers of claystone, shale, limestone and sandstone in the lower section of the rocks making up the Boquillas Formation are seen in this image. These thin layers sit on top of the Buda Limestone in which the tinajas are carved by erosion. The tectonic uplift and faulting of the Dead Horse Mountains caused these beds to shift over the top of the Buda Limestone creating 'folds' as seen in this image.