Credits:
Created with images by Mickyboyc - "High Force" • jurvetson - "Petrified sand dunes — a fine-grain record built over 60 million years" • skeeze - "sedona arizona landscape" • yaybiscuits123 - "Breccia" • James St. John - "Green shale" • baka_san - "Rocks" • Mauro Cateb - "Measuring a topaz"