IGNEOUS DIKES
Igneous dikes are planar to
irregularly-planar igneous intrusions that cut across country rocks. They can be thin or extremely thick
& they can be vertical or obliquely-oriented.
These photos linked to below show dikes of
various lithologies (granite, pegmatite, aplite, andesite, basalt/diabase,
lamprophyre, clinopyroxene-garnet-oligoclase granulite, minette, rhyolite)
intruding country rocks of various lithologies.
The photos linked to below were taken in
Colorado (Glenwood Canyon; Black Canyon of the Gunnison area; Cripple Creek
Gold District), Wyoming (Absaroka Range), Montana (Butte), California (Sierra
Nevada Mountains), New York State (Adirondack Mountains), Maine (Acadia
National Park), New Hampshire (Ruggles Mine), New Mexico (Ship Rock area), and
South Dakota (Black Hills).
Igneous dikes photos