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Fig. 8. Stereo aerial photo pairs of lacustrine analogs from Lake Bonneville to the martian stepped massifs. (a) Pavant Butte, a 300 m high volcanic cone near Delta, Utah. Pavant Butte is a basaltic ash cone that erupted into Lake Bonneville within 500 years of the lake's spillover at Red Rock Pass [Oviatt and Nash, 1989]. The Bonneville shore platform (white arrows) is about 80 m high and as much as 0.5 km wide. The southwest side of the cone has been completely eroded by wave action. Black arrow indicates sea cliff at the Provo level, which has undercut the Bonneville platform on Pavant Butte's north side. Aerial photos courtesy of U.S. Department of Agriculture.

Figure 8 Stereo aerial photo pairs of lacustrine analogs from Lake Bonneville to the martian stepped massifs. (a) Pavant Butte, a 300 m high volcanic cone near Delta, Utah. Pavant Butte is a basaltic ash cone that erupted into Lake Bonneville within 500 years of the lake's spillover at Red Rock Pass [Oviatt and Nash, 1989]. The Bonneville shore platform (white arrows) is about 80 m high and as much as 0.5 km wide. The southwest side of the cone has been completely eroded by wave action. Black arrow indicates sea cliff at the Provo level, which has undercut the Bonneville platform on Pavant Butte's north side. Aerial photos courtesy of U.S. Department of Agriculture.