Monday, September 19, 2011

Nail Line Bent Right-Laterally by Creep


Nail line bent right-laterally by creep on San Andreas fault, Nyland Ranch, San Juan Bautista, 1993. From the Geology Teaching Slides of Dr. Arthur Gibbs Sylvester.

Sunday, September 18, 2011

En Echelon Riedel Shears and Associated Popup


Ground view of en echelon Riedel shears and associated popup formed in asphalt by 1 m right lateral slip on Barbara Worth Road, Imperial Valley. From the Geology Teaching Slides of Dr. Arthur Gibbs Sylvester.

Saturday, September 17, 2011

Buckled Freeway Deck Over Crack Zone


Buckled freeway deck over crack zone that extends through freeway interchange area. From the Geology Teaching Slides of Dr. Arthur Gibbs Sylvester.

Friday, September 16, 2011

Crack in Highway 46


Ground fracture in Hwy 46 on San Andreas fault, 0.5 mi east of Cholame, California, USA. From the Geology Teaching Slides of Dr. Arthur Gibbs Sylvester.