Sidney Hough

Rocks

I'm looking for: old rocks (~250+ Ma), rocks of rare compositions, unconformities, rocks that have undergone significant stresses, rocks that formed in unusual or violent events, formations unique to a region.

Toadstool (Dakota + Entrada Sandstone).

Reduction spheroid.

Columnar jointing at Latourell Falls.

Breccias of Pinnacles National Park.

Tafoni sandstone along Arroyo de Los Frijoles.

Turtle Rock (blueschist).

Folded Franciscan chert.

Glacial erratic at Discovery Park.