Map Notes

Clinton Map 7 were created by receding Mitchell and are generally regional Physiography topographic highs. Bayfield Milverton Seaforth Sand are generally the result Watershed Characterization Report of water-laid alluvial/beach Thames Watershed & Region Cr. deposits. irl Milverton Wh (Upper Thames River & Lower Thames r Mitchell Clay plains represent the sediment WATERLOO Rive PERTH Source Protection Areas) that was deposited in deeper water Waterloo Sands farther off-shore than the sand Lake HURON Easthope plains. Cr. r Huron Flat Black Rive New Hamburg Legend

C s Exeter r on

Till is a heterogeneous mixture of . Av Stratford ame clay, silt, sand, and pebbles. Th Thames Watershed & Region Beveled plains are relatively Tavistock Grand Bend flat, reworked till plains that were Thames Watershed Boundary deposited and then over-ridden by t Cr. Trou a subsequent glacial event. Fish St. Marys C Municipal Boundaries Port Franks r. Drumlinized or un-drumlinized till Lakeside r

plains simply refer to the presence Lucan Rive Physiography Type orth orth

or absence of on the N Parkhill surface of a till . s Beaches and Shorecliffs ame Th Cedar Woodstock Drumlins (and flutings) are Wyoming Medw Bevelled Till Plains e OXFORDCr. Forest Thorndale l streamlined landforms formed by MICHIGAN ay C River r. es variations in stress on the sediment Midd am Clay Plains bed by a and indicate MIDDLESEX Thamesford Th oCr. glacier flow direction. n Cr. bu rg Cr. th Ingersoll Coldstream Wau Sou Arva Pottersbu Clay and till plains are thick and Seaforth Oxbow Sarnia relatively impermeable (i.e. water Dorchester Moraines does not move through it easily). Wyoming Watford Strathroy Komoka IngersollLondon Reyn As a result, these areas provide olds C Peat and Muck good protection to groundwater but r. r Dingman Cr. low recharge capability. Recharge LAMBTON Mount Brydges Westminster Sand Plains occurs when surface water Petrolia percolates down through the soil to r Tillsonburg Rive St. Thomas Spillways reach the water table. The Rive Alvinston groundwater in the clay and till Gen plains moves extremely slowly, tlem Tillsonburg Till Moraines en lair and could be over a thousand years Oil Springs C r. Aylmer old. St. Thomas Till Plains Drumlinized C NewGlencoe biggen s Cr. ame Battleh Th Drumlins and moraines are often Cr. St. Talbot Till Plains Undrumlinized permeable and provide ill ELGIN Newbury Cr. groundwater recharge, but these Port Stanley Water qualities also make them Dutton vulnerable to contaminants carried Bothwell Moraines down by surface water. Wallaceburg West Lorne Dresden Sand plains and spillways are very permeable and are vulnerable to Thamesville Cr. Sixteen contamination. These areas are r M PARRY SOUND ile Rive MUSKOKA HALIBURTON g Cr. often excellent sources of water as in Georgian Highgate HASTINGS they have high water tables and Flem Bay water is easily accessed. PETERBOROUGH KAWARTHA LAKES s Lake Blenheim SIMCOE ame Lake Simcoe GREY ² Ridgetown Watercourse Information Lake Th r. Huron BRUCE NORTHUMBERLAND regor C Due to the complexity of the CHATHAM-KENT DURHAM PRINCE EDWARD 0 5 10 20 30 40 McG DUFFERIN Thames River watershed St. Clair r. Chatham YORK elief D e R km watercourse network, only 3rd arlan PEEL McF WELLINGTON TORONTO HURON order and greater watercourses are Lock Map created by UTRCA, August 2007. Cr. Lake Dr. Blenheim HALTON shown. ettes PERTH Jeann WATERLOO Ontario Baptiste C Charing Cross Lake Base mapping produced under license with the Ontario Ministry of Natural

Watershed Boundaries r. HAMILTON Resources. © 2007. r. BRANT OXFORD r. NIAGARA ry C Erie Watershed boundaries shown are C Tilbury MIDDLESEX Physiography derived from: Chapman, L.J. & D.F. Putnam. 1973. Big HALDIMAND not precisely defined. The Tilbu LAMBTON The Physiography of Southern Ontario. boundaries were originally created NORFOLK ELGIN using watercourse and elevation ESSEX information from 1:50,000 N.T.S. Lake CHATHAM-KENT St. Clair Thames-Sydenham mapping. Lake Erie and Region ESSEX Legend Municipal Boundaries Document Reference Thames Watershed & Region 2.2.3 Physiography Source Protection Region Leamington