This week's Friday Field Foto is from an area just west of Death Valley called Darwin Canyon. As you can see, there is a sharp, angular contact between two sedimentary formations -- an angular ...

This week’s Friday Field Photo is another one from a recent trip to the Spanish Pyrenees. What do you see? Although it may not look like much at first glance this outcrop is a nice example of a ...

It was first described in 1788 by James Hutton, the ‘father of geology’, as an example of an angular unconformity – a junction between two sets of rocks of different ages.