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Neotectonic faulting in metropolitan Toronto: Implications for earthquake hazard assessment in the Lake Ontario region

1992; Geological Society of America; Volume: 20; Issue: 11 Linguagem: Inglês

10.1130/0091-7613(1992)020 2.3.co;2

1943-2682

A. A. Mohajer, N. Eyles, C. Rogojina,

Seismology and Earthquake Studies

Research Article| November 01, 1992 Neotectonic faulting in metropolitan Toronto: Implications for earthquake hazard assessment in the Lake Ontario region A. Mohajer; A. Mohajer 1Seismican Geophysical Ltd., 239 Dunview Avenue, North York, Ontario M2N 4J3, Canada Search for other works by this author on: GSW Google Scholar N. Eyles; N. Eyles 2Glaciated Basin Research Group, Department of Geology, Scarborough Campus, University of Toronto, 1265 Military Trail, Scarborough, Ontario M1C 1A4, Canada Search for other works by this author on: GSW Google Scholar C. Rogojina C. Rogojina 2Glaciated Basin Research Group, Department of Geology, Scarborough Campus, University of Toronto, 1265 Military Trail, Scarborough, Ontario M1C 1A4, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information A. Mohajer 1Seismican Geophysical Ltd., 239 Dunview Avenue, North York, Ontario M2N 4J3, Canada N. Eyles 2Glaciated Basin Research Group, Department of Geology, Scarborough Campus, University of Toronto, 1265 Military Trail, Scarborough, Ontario M1C 1A4, Canada C. Rogojina 2Glaciated Basin Research Group, Department of Geology, Scarborough Campus, University of Toronto, 1265 Military Trail, Scarborough, Ontario M1C 1A4, Canada Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1992) 20 (11): 1003–1006. https://doi.org/10.1130/0091-7613(1992)020 2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation A. Mohajer, N. Eyles, C. Rogojina; Neotectonic faulting in metropolitan Toronto: Implications for earthquake hazard assessment in the Lake Ontario region. Geology 1992;; 20 (11): 1003–1006. doi: https://doi.org/10.1130/0091-7613(1992)020 2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Persistent small-scale seismicity around the western end of Lake Ontario, together with larger events in eastern North America, have focused attention on the seismotectonic and neotectonic conditions of southern Ontario and adjacent New York State. Newly discovered normal faults that offset both bedrock and overlying Quaternary sediments by as much as 1.25 m were discovered along the Rouge Valley in metropolitan Toronto. This location is within a zone marked by the intersection of three major lineaments and an elevated level of seismicity. These faults result from reactivation of east-west-oriented fractures in Ordovician shales. Structures are exposed in section only and have no surface expression, suggesting that others may have gone undetected. The origin of the faults is not yet well established, although they may represent the effects of uplift consequent upon isostatic rebound aided by high horizontal compressive stress. Nevertheless, their development in the recent geologic past has important implications for regional seismic hazard assessment, because they occur within 7 km of the Pickering nuclear power plant. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.