Structural Geology – Page 2

Melange, Washington

November 22, 2017/in Brittle Deformation/by Marli Miller

cataclastic

Angular unconformity, Olympic Coast, Washington

November 22, 2017/in Unconformities/by Marli Miller

Recumbently folded calc-silicate gneiss

November 22, 2017/in Ductile Deformation/by Marli Miller

Deformed dike in mylonite

November 22, 2017/in Ductile Deformation/by Marli Miller

foliation, mylonite

Deformed metaconglomerate (vertical)

November 19, 2017/in Ductile Deformation/by Marli Miller

metasedimentary

Bedding and foliation

November 19, 2017/in Ductile Deformation/by Marli Miller

metamorphic foliation, metasedimentary

Nonconformity. SW Montana

August 31, 2017/in Unconformities/by Marli Miller

depositional contact, sedimentary, metamorphic, unconformity

Lewis Thrust fault, N. Montana

August 31, 2017/in Brittle Deformation/by Marli Miller

overthrust, Precambrian

Folded radiolarian chert (Vertical)

April 30, 2017/in chert, Cretaceous Period, Folded, Jurassic Period, Marin Headlands, overturned, radiolarian California, Ductile Deformation/by Marli Miller

anticline, syncline, structural geology, sedimentary

Apparent Dip (vertical)

April 30, 2017/in apparent dip, building, cross bedded, stone Miscellaneous, Structural Geology/by Marli Miller

building stone

Buttress Unconformity, northern Arizona

April 30, 2017/in Arizona, Unconformities/by Marli Miller

Buttress Unconformity, northern Arizona. In buttress unconformities, the younger material
is deposited against the older material, resulting in the apparent truncation of the younger rock. On
closer inspection, however, one can see erosional features along the contact to indicate its depositional
origin. (ID SrU-25)