Devils Tower
Videos
Devils Tower is a laccolithic butte, composed of igneous rock in the Bear Lodge Ranger District of the Black Hills, near Hulett and Sundance in Crook County, northeastern Wyoming, above the Belle Four
Columnar jointed porphyritic phonolite 48
A sign informs visitors of the site's Native American heritage.
Deer grazing at the national monument entrance
Devils Tower Darton 1900
Laccolith
Videos
A laccolith is a body of intrusive rock with a dome-shaped upper surface and a level base, fed by a conduit from below. A laccolith forms when magma rising through the Earth's crust begins to spread o
Devils Tower
…Devils Tower (also known as Matȟó Thípila or Bear Lodge) is a laccolithic butte, composed of igneous rock in the Bear Lodge Ranger District of the Black Hills, near Hulett and Sundance in Crook County, northeastern Wyoming…
Idealized laccolith shape
Dolerite intrusion laccolith in Sydney, Australia
Laccolith exposed by erosion of overlying strata in Montana
Pink monzonite laccolith intrudes within the grey Cambrian and Ordovician strata near Notch Peak, Utah