Free images results:
 

Dirt pictures, stock photos and images

 
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Tree Trunks Stock Images
Author: Lydia
Forest Path Stock Image
Author: Nickr
Cactus Royalty Free Stock Photography
Author: Rinderart
Fly Stock Photos
Fly
Author: Mitya73
Moss Stock Images
Author: Atee83
The Fly Royalty Free Stock Photography
Author: Marilyna
Reflux Royalty Free Stock Image
Author: Illreality
Deer Royalty Free Stock Image
Author: Ichtor
Desert Stock Image
Author: Jptexas
 
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Also, here are some commercial RF-licensed images that match your search criteria:  
Heap dirt Royalty Free Stock Photo
Author: Galdzer

Explore more commercial options: More Dirt Stock Illustrations & Vectors | More Dirt Stock Video Footage