Figure 4. Analog model E 350: Orthogonal Rift. (a) Overhead view of analog model after 4 cm extension. Illumination is from the left. (b) Overhead view of analog model after 7.5 cm extension. Illumination is from the left. (c) Line diagram interpretation of the surface fault pattern at the end of extension. Dark bands are faults dipping to the right, and light bands are faults dipping to the left. The blue shading marks the stretched rubber sheet at the base of the model. (d) Serial sections through the orthogonal rift model. Synkinematic strata are the red and white layers at the top of the grabens on each side of the central intrarift horst block. Location of sections is indicated in (c).

Click here for sequence of Figure 4a, b, c.      Click here for sequence of sections shown in 4d.