The seismically active Clarendon-Linden Fault of western New York State appears to connect with the Salmon River Fault and possibly with the Picton Fault, both of which cut through Prince Edward County, southern Ontario. Bedrock exposures display a variety of structural features including faults, fractures, and pop-ups which indicate that the region has been subjected to repeated tectonism since the Middle Ordovician. Thus, despite the general perception that Prince Edward County and the rest of the Lake Ontario region is one of low seismic potential, geological and geophysical data suggest otherwise.La faille sismiquement active de Clarendon-Linden dans l'ouest de l'État de New York semble être reliée à la faille de Salmon River et probablement à la faille de Picton, qui traversent toutes deux le comté de Prince Edward. Les affleurements laissent voir une variété de formes structurales, comprenant des failles, des fractures et des soulèvements qui démontrent que la région à été tectonisée depuis l'Ordovicien moyen. Ainsi, même si l'on croit généralement que le comté de Prince Edward et l'ensemble de la région du lac Ontario est une zone de faible sismicité, les données géologiques et géophysiques donnent des indications contraires.Die seis-misch aktive Clarendon-Linden-Verwerfung im Westen des Staates New York scheint mit der Salmon River-Verwerfung und môglicherweise mit der Picton-Verwerfung, die beide den Prince Edward-Bezirk durchqueren, verbunden zu sein. Die Aufschlùsse anstehenden Gesteins bestehen aus einer Vielfalt struktureller Formen wie Verwerfungen, Bruche und Hebungen, welche zeigen, dafi die Region seit dem mittleren Ordovicium wiederholter Tektonik ausgesetzt war. Trotz der allgemeinen Annahme, daB der Prince Edward-Bezirk und der Rest der Ontario-See-Region ein niedriges seis-misches Potential hat, belegen so geologische und geophysikalische Daten das Gegenteil
A fault zone coinciding with a Middle Jurassic, ultramafic dyke exposed in the Picton Quarry in Prince Edward County, Ontario, is marked by steeply dipping, generally east–west-striking fractures. The dyke has been affected by faulting, as evidenced by the presence of subhorizontal slickensides on fractures cutting the dyke rock. This discovery constitutes the first known example of Middle Jurassic or younger faulting having affected Paleozoic strata of southern Ontario and indicates that the structural and tectonic history of the region is more complex than commonly believed.
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