Moru Kopje, Serengeti
Gregory G. Dimijian, M.D.
Granite #3
Phillip Hayson
Olivine Gabbro
Ray Simons
Granite Intrusion
Science Source
Granite #7
Phillip Hayson
Joshua Tree Rock Formations
Charlie Ott
Joshua Tree Rock Formations #1
Charlie Ott
Diabase Sill
Carleton Ray
Granite And Diabase
Carleton Ray
Cretaceous Granodiorite Outcrops, Idaho
William Mullins
Granite #1
Phillip Hayson
Variety Of Igneous Rocks
A.b. Joyce
Variety Of Igneous Rocks #1
A.b. Joyce
Eroding Rocks, California
Charlie Ott
Granite From The Idaho Batholith
William Mullins
Cretaceous Granodiorite Outcrops, Idaho #2
William Mullins
Granite Lm #1
Eric V. Grave
Joshua Tree National Park, California
Ron Sanford
Kings Canyon National Park #2
Gregory G. Dimijian, M.D.
Granite Eruption
Science Source
Granite #4
Phillip Hayson
Bands Of Granite
William H. Mullins
Orbicular Granite
Phillip Hayson
Joshua Tree Rock Formations #2
Charlie Ott
Pisgah National Forest, Nc
Kenneth Murray
Olivine Basalt
Ray Simons
Joshua Tree National Park #14
Mark Newman
Igneous Rocks
GIPhotoStock
Granite Layer
Karl H. Switak
Granite #2
Phillip Hayson
Diabase Sill #1
Carleton Ray
Joshua Tree Rock Formations
Gregory G. Dimijian, M.D.
Three Kinds Of Rocks
A.b. Joyce
Quartz Vein In Granite
A.b. Joyce
Aplite Dike In Monzogranite
Charlie Ott
Kings Canyon National Park #1
Gregory G. Dimijian, M.D.
Boars Tusk, Wyoming
Johnny Lichter
Tree On A Rock
Richard Hansen
Granite #5
Phillip Hayson
Orbicular Granite
A.b. Joyce
Joshua Tree Rock Formations #3
Charlie Ott
Looking Glass Rock, Nc
Kenneth Murray
Shiprock, New Mexico
E.r. Degginger
Cretaceous Granodiorite Outcrops, Idaho #1
William Mullins
Joshua Tree National Park #10
Mark Newman
Soit Ngum Kopje, Serengeti
Gregory G. Dimijian, M.D.