00000nam 2200000zi 4500 9.870461 CaOODSP 20241203113647 m o d f cr ||||||||||| 190322s1999 onc #ot f|0| 0 eng d CaOODSP eng rda CaOODSP eng fre n-cn-on En13-5/99-257E-PDF Coakley, J. P. author. (John Phillip), 1940- Sedimentary environment of Lake Ontario : geologic setting, sediment processes, and environmental hazards / Coakley, J.P. and Lewis, C.F.M. [Burlington, Ontario] : Environment Canada, Water Science and Technology Directorate = Environnement Canada, Direction générale des sciences et de la technologie, eau, [1999] 1 online resource (34 pages) : maps. text txt rdacontent computer c rdamedia online resource cr rdacarrier NWRI contribution ; 99-257 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "Levels of hazardous contaminants coming into the lake from the upper Lakes and the Niagara River remain high, but some toxic metals, PCB and Mirex, have fallen considerably since the 1970s. Atmospheric deposition, upstream lakes, and municipal and industrial discharges continue to be important sources of contaminants within the lake watershed. Other important geoscience or sediment-related issues are seismic risks to an increasingly urbanized shore-zone, shore erosion, and the effects of habitat change brought about by zebra mussel colonization of the benthic environment in Lake Ontario"--Abstract. Includes abstract in French. gccst Sediments gccst Lakes gccst Water pollution Lewis, C. F. M., author. Canada. Environment Canada. National Water Research Institute (Canada) NWRI contribution ; 99-257. (CaOODSP)9.844121 PDF 2.91 MB https://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-99-257-eng.pdf