The following are some desert rock textures which may be used free of charge with attribution for educational projects. Desert cactus texture, stone texture and rock layers in arid environment.
Below: Strawberry Cactus thorns in the desert.
An old juniper tree and outcropping of limestone rock layers.
Example of conglomerate rock outcropping. Conglomerate rocks are made when loose rock are cemented into the rock matrix.
Iron oxide coloring in limestone rock outcropping.
Below: Fossilized ripples from an ancient shoreline preserved in sandstone rock outcropping.
The eroding bank of a dry creek with calcite and gypsum.
Feel free to use any of these photos of soil erosion and rock layers in your educational project.