Dike (geology)
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In geology, a dike or dyke is a sheet of rock that is formed in a fracture of a pre-existing rock body. Dikes can be either magmatic or sedimentary in origin. Magmatic dikes form when magma flows into
A magmatic dike (vertical) cross-cutting horizontal layers of sedimentary rock, in Makhtesh Ramon, Israel
A dike of lamprophyre near the Shiprock volcanic plug, New Mexico, that has resisted the erosion that removed some of the softer rock into which the dike was originally intruded
A composite dike in Orkney, Scotland, with bostonite margins and a camptonite center
Sheeted dikes of the Lizard complex, Cornwall, England
Dike swarm
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A dike swarm or dyke swarm is a large geological structure consisting of a major group of parallel, linear, or radially oriented magmatic dikes intruded within continental crust or central volcanoes i
Dike (geology)
…average 3 to 5 meters in width, but one 53-kilometer stretch of coast has about 1000 dikes with total thickness of 3 kilometers. The world's largest dike swarm is the Mackenzie dike swarm in the Northwest Territories, Canada. Dike swarms (also called dike complexes) are exposed in the eroded rift zones of…
Magmatic dikes radiating from West Spanish Peak, Colorado, US
View of the Kattsund-Koster dyke swarm in the Koster Islands, western Sweden
Dike swarms of Caldera de Taburiente, La Palma, Spain
Heavily altered dike swarm of the Torfajökull caldera near Landmannalaugar, Iceland