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Fig. 1. A small-format aerial photograph taken out the door of a Cessna 206 aircraft of the site of Lemudong'o, a six-million-year-old terrestrial fossil site near Narok, Kenya. The white arrow indicates the originally identified fossil site. The black arrows indicate other exposures that were surveyed, several of which were also fossiliferous, especially those in the background of the photo on the skirts of the flat-topped hill, Enaman Kewon. The Masai bomas in the lower left provide a sense of scale.
Fig. 2. Ground-truthing satellite imagery of the one-million-year-old volcano and associated rifting at Hanang, Tanzania, in 2008. The arrow on the right links the volcano, Mt. Hanang, as seen in the satellite image (panel C) to the volcano as seen from the ground (panel A). The arrow on the left connects the uplifted fault block as seen from the ground in panel A. The small white-reflecting patches that dot the edge of the uplifted fault blocks in panel C are small outcrops of sediments, as seen in panel B.
Fig. 3. At the top of this figure is a composite satellite image of the entire gorge. The photograph below shows OVPP team members collecting corrected GPS coordinates to record the specific location of one of the thousands of fossils at Olduvai Gorge, Tanzania. Meter-resolution is important at Olduvai Gorge given the steep slopes. Stratigraphic placement provides a critical lower boundary for the age of the sediments from which a fossil may have derived. Five meters to the right of where this fossil was found represents approximately two hundred thousand years of geological time.