Red Valerian (centranthus Ruber) Flowers
Bruno Petriglia
Gravel Pit Pond
Dr Keith Wheeler/science Photo Library
Sand And Gravel Mine #1
Jim West/science Photo Library
Sand And Gravel Mine
Jim West/science Photo Library
Sand And Gravel Mine #2
Jim West/science Photo Library
Construction Worker And Bulldozer
Christian Lagerek/science Photo Library
Piltdown Skull Gravel Pit, 1910s
Natural History Museum, London
Stone Quarry
Photostock-israel