Easter Island #4
George Holton
Carrara Marble Quarry, 20th Century
Photo Researchers
Saint-acheul, Acheulean Archeological
Science Source
Palm Frond And Fish
James L. Amos
Carrara Marble Quarries
Nigel Cattlin
Open Pit Quarry Mine
Ted Kinsman
Ochre Quarry In France
James Steinberg
Limestone Pit
Inga Spence
Dinosaur National Monument #1
Charlie Ott
Dinosaur National Monument
Charlie Ott
Bones At Dinosaur National Monument
Charlie Ott
Moai, Easter Island
George Holton
Dinosaur National Monument
Harold Brodrick/Science Source
Fossil Garpike
James L. Amos
Young Geologist
Ted Kinsman
Easter Island #2
George Holton
Flint Hatchet, Stone Age Tool
Science Source
Young Geologist #1
Ted Kinsman
The Lavender Pit
James Zipp