Kenneth M. Cruikshank
Joints Part II. Surface Features

Schematic block diagrams illustrating surface markings on joint faces

(Figure 3.14, Twiss and Moore 1992)

Joint initiation point can be seen in center of photograph

(Slide ID: 1991-01-03)

Initiation point can be seen in lower-center of photograph

(Slide ID: 1990-03-10)

Joint initiation point is in the upper center of the photograph

(Slide ID: 1990-03-33)

Twist-hackle on a large joint surface

(Slide ID: 1991-11-08)

Large joint surface

(Slide ID: 1991-06-14)

Fracture surface, with propagation towards the viewer.

(Slide ID: 1991-10-18)

Valley of Fire State Park, Nevada

(Slide ID: 1989-02-07)

(Slide ID: 1989-02-08)

(Slide ID: 1989-02-10)

(Slide ID: 1992-06-10)

(Slide ID: 1989-02-12)

(Slide ID: 1989-02-11)

Joint surface - Arvid Johnson for scale. (Slide ID: 1983-08-15)

Joint surface - Kees DeJong and Arvid Johnson for scale. (Slide ID: 1983-08-16)