Dikes and Sills

Granitic dikes in Precambrian gneiss. Black Canyon of the Gunnison, Colorado.


Granitic dike cutting Precambrian gneiss. Grand Teton National Park, Wyoming.


Dike and Shiprock, Arizona.


Mafic dikes cutting deformed marble. Death Valley, CA.


Deformed pegmatite sills in gneiss. Death Valley, CA.


Mafic sill in thinly bedded sandstone and siltstone. Southern British Columbia.


Granitic sill in Precambrian gneiss. Rocky Mountain National Park, Colorado.


Intrusive Igneous rock --pegmatite dike intruding granite.


Basaltic dike intruding folded Paleozoic rock, SE California


Basaltic dike intruding gneiss. Badwater Turtleback, Death Valley California. Note the fault that offsets the dike.


Diabase (basaltic) sills (green) intruding Proterozoic rock, Death Valley, California.


Basaltic dike (below) and sill (above) intruding foliated marble, Death Valley, California.