biological soil crust

arid barren barrenness biologic biological biology clay climate closeup crack cracked cracks crust cryptobiotic dead desert desolate detail dirt drain dramatic drought dry dryness dust earth ecology ecosystem empty environment environmental eroded erosion essential extreme forms fragile geology global ground heat infertile land landscape life living microbiotic mud natural nature nutrients organic organism organisms path pattern relief rough sand scenery scenic scorched slickrock soil split splitting surface terrain texture textured warming wasteland waterless