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Haasgat
Haasgat is a fossiliferous South African paleocave located in the Cradle of Humankind UNESCO World Heritage Area, approx. northeast of the hominin-bearing sites of Sterkfontein and Swartkrans and ~ north-northwest of the City of Johannesburg. It is located on private land and is not accessible by the public. The cave system formed on the western slope of a narrow, north-south valley excised by a southeastern tributary of the Witwatersrandspruit River. As is the case with many of the dolomitic paleocaves in the region, the system was extensively mined for lime during the early 20th century. Although this mining obliterated the original cave entrance and parts of the system, the miners largely followed the original contours of the system. As a result, Haasgat is somewhat unique in maintaining both the original roof and parietal contours, as well as remnant fossiliferous bands of calcified sediments throughout the ~100m long tunnel that comprises the modern cave.〔Keyser and Martini, 1991; Adams, 2013; Herries et al., 2013〕
==History of investigations==
While Haasgat was long known to residents of the Kalkheuvel West region (who named the cave Haasgat (hare hole'' ) after a resident red rock hare), the system was first mapped during a survey of regional caves by Martini and Keyser in 1987.〔Keyser, 1991; Keyser and Martini, 1991〕 The extensive ''ex situ'' calificied sediment miner's dumps at Haasgat were sampled by Andre Keyser in the late 1980s, yielding a fossil assemblage that was partially described in a series of publications.〔Keyer, 1991; Keyser and Martini, 1991; McKee and Keyser, 1994; Plug and Keyser, 1994〕 The site was abandoned after this single phase of sampling and data from the site has rarely been incorporated into studies of South African Plio-Pleistocene fossil record. Since 2010, an international interdisciplinary team has initiated a new phase of ''ex situ ''and ''in situ'' excavation, geological sampling, and faunal analysis.〔Adams, 2011; Kegley et al., 2011; Adams, 2013; Herries et al., 2013〕 Currently, this research program integrates researchers from the Ditsong National Museum of Natural History (South Africa; Stephany Potze, Lazarus Kgasi), Monash University (Australia; Justin W. Adams), La Trobe University (Australia; Andy I.R. Herries), Grand Valley State University (USA; Anthony D.T. Kegley), University of Melbourne (Australia; Robyn Pickering), and the School of Anatomical Sciences at the University of the Witwatersrand (South Africa; Jason Hemingway).
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