Abstract
Proglacial subaquatic fans between Leamington and Colchester, Essex County, Ontario, were deposited in glacial Lake Maumee at the end of the Port Bruce Stade by ice retreating northward. Some fans were buried by till and glaciolacustrine materials. One fan surface, northwest of Leamington, was only modified by lake current that transgressed and regressed over it. An aggregate excavation (Bondi site) exists within the surface of this fan. We describe the sedimentology of the site that provides evidence for fan and overlying bar deposits.Lake levels fell to the levels of lakes Arkona (216 m) and Ypsilanti (122 m) following the deposition of the fans. Large terrestrial areas supported plants and animals. Their presence is recorded at the Bondi site by a single bone and several organic mats recovered from the fan and bar sediment contact at two separate exposures. Radiocarbon dates on the bone of 13 410 ± 100 BP (TO-1803), organic material dates of 13 225 ± 200 BP (BGS-1404) and 13 150 ± 100 BP (WE-01-89), th...
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