Norbert Wu / Granite Island and Coconut Palms, unique idyllic islands, Seychelles, Indian Ocean

Albert Lleal / Granite boulder, Aiguestortes I Estany de Sant Maurici National Park, Pyrenees, Catalonia, Spain

Phil Savoie / Trees and shrubs above igneous rock outcrop. Stanner Rocks National Nature Reserve, Powys, Wales, UK, September.

Phil Savoie / Rock Stonecrop (Sedum forsterianum) on igneous rock. Stanner Rocks National Nature Reserve, Powys, Wales, UK, September.

Phil Savoie / Igneous rock geology and vegetation. Stanner Rocks National Nature Reserve, Powys, Wales, UK.

Pete Oxford / Granite rock formation, Khogno Khan, central Mongolia

Brent Stephenson / Columnar basalt formations at the 180 metre high Edinburgh Hill. South Shetland Islands, Antarctica, December.

Brent Stephenson / Columnar basalt formations at the 180 metre high Edinburgh Hill. South Shetland Islands, Antarctica, December.

Brent Stephenson / Columnar basalt formations at the 180 metre high Edinburgh Hill. South Shetland Islands, Antarctica, December.

Chien Lee / Granite boulders on coastline, Tanjung Datu National Park, Sarawak, Borneo, Malaysia

Yva Momatiuk & John Eastcott / Granite boulders and trees, Devils Marbles Conservation Reserve, Northern Territory, Australia

Yva Momatiuk & John Eastcott / Granite boulders, Devils Marbles Conservation Reserve, Northern Territory, Australia

Yva Momatiuk & John Eastcott / Granite boulders, Devils Marbles Conservation Reserve, Northern Territory, Australia

Yva Momatiuk & John Eastcott / Granite boulders, Devils Marbles Conservation Reserve, Northern Territory, Australia

Graham Eaton / Pillow lava of Ordovician age (440 million years), formed by lava rapidly cooling in the sea. Porth Dinllaen, Nefyn, Wales, July 2011.

Konrad Wothe / Granite rock formations, Capo Testa, northern Sardinia, Italy

Konrad Wothe / Granite rock formations, Capo Testa, northern Sardinia, Italy

Konrad Wothe / Granite rock formations, Capo Testa, northern Sardinia, Italy

Yva Momatiuk & John Eastcott / Granite rock arch and boulders, Joshua Tree National Park, California

Pete Oxford / Devils Tower National Monument, East Wyoming. USA - formed from a molten magma plug

Scott Leslie / Coastal granite rocks, Cape Breton Highlands National Park, Gulf of St. Lawrence, Nova Scotia, Canada

Scott Leslie / Coastal granite rocks, Cape Breton Highlands National Park, Gulf of St. Lawrence, Nova Scotia, Canada

Scott Leslie / Coastal granite rocks, Cape Breton Highlands National Park, Gulf of St. Lawrence, Nova Scotia, Canada

Tim Fitzharris / Granite boulders, Castle Rocks State Park, Idaho

Tim Fitzharris / Granite formations, Castle Rocks State Park, Idaho

Niall Benvie / Close up of Granite rock, Scotland, UK

Niall Benvie / Close up of Granite rock, Scotland, UK

Niall Benvie / Close up of Granite rock, Scotland, UK

Niall Benvie / Close up of Granite rock, Scotland, UK

Niall Benvie / Close up of Granite rock, Scotland, UK

Niall Benvie / Close up of Granite rock, Scotland, UK

Niall Benvie / Close up of Granite rock, Scotland, UK

Niall Benvie / Close up of Granite rock, Scotland, UK

Francis Abbott / The Risco Blanco igneous intrusion on the northern escarpment of the Tirajana caldera, composed of highly evolved alkaline hauyne-phonolite rock, Gran Canaria, Canary Islands. 3.9 million years old,...

Scott Leslie / Columnar basalt, Brier Island, Nova Scotia, Canada

Scott Leslie / Columnar basalt and cobble, Brier Island, Nova Scotia, Canada

Albert Lleal / Basalt columns along the coast, La Palma Island, Canary Islands, Spain

Tim Fitzharris / Devil's Tower National Monument showing famous basalt tower, sacred site for Native Americans, Wyoming

Tim Fitzharris / Devil's Tower National Monument showing famous basalt tower, sacred site for Native Americans, Wyoming

Tim Fitzharris / Devil's Tower National Monument showing famous basalt tower, sacred site for Native Americans, Wyoming

Tim Fitzharris / Devil's Tower National Monument showing famous basalt tower, sacred site for Native Americans, Wyoming

Tim Fitzharris / Devil's Tower National Monument showing famous basalt tower, sacred site for Native Americans, Wyoming

Grant Dixon / Granite boulder in Honeymoon Bay, Freycinet National Park, Tasmania, Australia

Jouan Rius / Hexagonal lava formations, Isle of Staffa, off the Isle of Mull, Inner Hebrides, Scotland, UK

Sumio Harada / Devils Tower, famous basalt tower, sacred site for Native Americans, Devils Tower National Monument, Wyoming

Piotr Naskrecki / Red granite outcropping in the Namib Desert, Namibia

Michael Durham / Irregular basalt projections and sea stacks on Cannon Beach, Oregon

Piotr Naskrecki / Grasshopper (Lithidium sp) lives on exposed granite rocks, Namib Desert, Namibia

Piotr Naskrecki / Namibian Rock Agama (Agama planiceps) male, Namibia

Piotr Naskrecki / Grasshopper (Lithidium sp) lives on exposed granite rocks in the Namib Desert, Namibia

Colin Monteath / Dolerite ventifact on Mt Bastion, Olympus Range, dry valleys, Transantarctic Mountains, Antarctica

Tim Fitzharris / Grasses and boulders at the base of the Sierra Nevada Range as seen from Alabama Hills, California

Tim Fitzharris / View of Sierra Nevada Range as seen from boulder field in Alabama Hills, California

Tim Fitzharris / Crescent moon rising over Sierra Nevada Range as seen from Alabama Hills, California

Tim Fitzharris / Cathedral Rock reflected in the Merced River, Yosemite National Park, California

Tim Fitzharris / El Capitan, also known as Agathla Peak, the basalt core of an extinct volcano, Monument Valley Navajo Tribal Park, Arizona

Michael & Patricia Fogden / Wave rock, 15 meters high and 110 meters long curved granite cliff face stained with dissolved carbonates and iron hydroxide, approximately 2700 million years old, Western Australia

Tim Fitzharris / Granite formations, Enchanted Rocks State Park, Texas

Michael & Patricia Fogden / Granite reflection in rock pool, Spitzkop, Damaraland, Namibia

Tim Fitzharris / Shiprock, the basalt core of an extinct volcano, New Mexico

Tim Fitzharris / Shiprock, the basalt core of an extinct volcano, tuff-breccia ejected boulders in foreground, New Mexico

Tim Fitzharris / Shiprock, the basalt core of an extinct volcano, tuff-breccia ejected boulders in foreground, New Mexico

Tim Fitzharris / Shiprock, the basalt core of an extinct volcano, New Mexico

Tim Fitzharris / El Capitan rising over the forest, Yosemite National Park, California

Tim Fitzharris / Sentinel Rock, reflected in water, Yosemite National Park, California

Gerry Ellis / Late light on face of monolith of El Capitan, Yosemite National Park, California

Tim Fitzharris / Mt Watkins reflected in Mirror Lake, Yosemite National Park, California

Tim Fitzharris / Cathedral rock reflected in the Merced River, Yosemite National Park, California

Norbert Wu / Coral sand beaches with unique granite formations, Seychelles, Indian Ocean

Norbert Wu / Casuarina (Casuarina equisetifolia) trees on Granite Island, Seychelles, Indian ocean

Tui De Roy / Snares Crested Penguin (Eudyptes robustus) group following commuter route up granite slope into Olearia forest, Station Point, Snares Islands, New Zealand

Norbert Wu / Granite Island and Coconut Palms, unique idyllic islands, Seychelles, Indian Ocean

Tui De Roy / Pinnacle Rock, tufa cone formation and volcanic beach, Bartolome Island, Galapagos Islands, Ecuador

Tui De Roy / Columnar joining in basalt formation, Smoothwater Bay, Campbell Island, New Zealand

Norbert Wu / Snorkeler Deanna Mah at The Baths, British Virgin Islands

Tim Fitzharris / Head Rock, granite formation, City of Rocks National Reserve, Idaho

Tim Fitzharris / Shrubland and granite rock formations, Castle Rocks State Park, Idaho

Tim Fitzharris / Granite boulders and Half Dome at Olmsted Point, Yosemite National Park, California

Albert Lleal / Granite boulders and Estany Negre Lake, Aiguestortes I Estany de Sant Maurici National Park, Pyrenees, Catalonia, Spain

Phil Savoie / Sheeps Bit (Jasione montana) in flower on igneous rock. Stanner Rocks National Nature Reserve, Powys, Wales, UK, September.

Phil Savoie / Sheeps Bit (Jasione montana) in flower on igneous rock. Stanner Rocks National Nature Reserve, Powys, Wales, UK, September.

Phil Savoie / Trees and shrubs above igneous rock outcrop. Stanner Rocks National Nature Reserve, Powys, Wales, UK, September.

Phil Savoie / Trees and shrubs above igneous rock outcrop. Stanner Rocks National Nature Reserve, Powys, Wales, UK, September.

Phil Savoie / Trees and shrubs above igneous rock outcrop. Stanner Rocks National Nature Reserve, Powys, Wales, UK, September.

Phil Savoie / Igneous rock outcrop. Stanner Rocks National Nature Reserve, Powys, Wales, UK, September.

Phil Savoie / Rock Stonecrop (Sedum forsterianum) on igneous rock. Stanner Rocks National Nature Reserve, Powys, Wales, UK, September.

Phil Savoie / Igneous rock geology and vegetation. Stanner Rocks National Nature Reserve, Powys, Wales, UK.

Yva Momatiuk & John Eastcott / Granite boulders, Devils Marbles Conservation Reserve, Northern Territory, Australia

Yva Momatiuk & John Eastcott / Granite rocks near Sierra Nevada, Alabama Hills, California

Kevin Schafer / Columnar basalt rock formations, Iceland

Kevin Schafer / Columnar basalt, Devil's Postpile National Monument, California

Harley Betts / Thousands of rounded granite boulders on the beach at the mouth of the Waitutu River, Fiordland National Park, New Zealand

Tui De Roy / Granite outcrop marking tip of peninsula, Cabo San Lucas, Baja California, Mexico

Tui De Roy / Granite outcrop marking tip of peninsula, Cabo San Lucas, Baja California, Mexico

Tui De Roy / Granite outcrop marking tip of peninsula, Cabo San Lucas, Baja California, Mexico