James St. John:
Pyrite concretions in black shale (Blocher Member, New Albany Shale, Devonian; Harding Street Quarry, Indianapolis, Indiana, USA) 1
jaygannett:
Monument Rocks, the Chalk Pyramids - Kansas 03
James St. John:
Halimeda incrassata (calcareous green algae) (San Salvador Island, Bahamas) 6
brandonzcreations:
Caught A Lucky Green Butterfly
Cole Chase Photography:
The Painted Hills Of Oregon
sunstormphotography.com:
Carlin Gill Valley, The Howgill Fells (Explored).
Marinelson Almeida Silva:
Parque Estadual da Pedra da Boca - Araruna - Paraíba.
Brian Romans:
IMG_1745
Brian Romans:
IMG_1942
tex.the.naturalist:
Prada Marfa
DenverDwight:
Streetside geology lesson
NASA Goddard Photo and Video:
Seeing the Aurora in a New Light
Istituto Nazionale di Geofisica e Vulcanologia:
Immagine SEM di stromatoliti silicee nel Lago Specchio di Venere (Pantelleria) / SEM image of a siliceous stromatolite from Specchio di Venere lake (Pantelleria island, Italy)
stpauliesgirl:
Border Patrol
bluesaps59:
Las Hurdes (Riomalo de Abajo) HDR
ken mccown:
Swirl and Strata
Martin_Heigan:
Dead Vlei Salt Pan
Miguel Vera:
La Pileta Inclinada / The Leaning Fountain
YellowknifeSilke:
GiantMine2008-009
