| Title | The search for glacially-induced faults in eastern Canada |
| Associated Data | https://doi.org/10.1594/PANGAEA.922705 |
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| Author | Adams, J ; Brooks,
G R |
| Source | Glacially-triggered faulting; by Steffen, H (ed.); Olesen, O (ed.); Sutinen, R (ed.); 2021 p. 341-353, https://doi.org/10.1017/9781108779906.025 |
| Links | Green Repository version - Version du dépôt vert
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| Image |  |
| Year | 2021 |
| Alt Series | Natural Resources Canada, Contribution Series 20190637 |
| Publisher | Cambridge University Press |
| Document | book |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Province | Canada; Canada; British Columbia; Alberta; Saskatchewan; Manitoba; Ontario; Quebec; New Brunswick; Nova Scotia; Prince Edward Island; Newfoundland and Labrador; Northwest Territories; Yukon;
Nunavut |
| NTS | 1; 2; 3; 10; 11; 12; 13; 14; 15; 16; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40; 41; 42; 43; 44; 45; 46; 47; 48; 49; 52; 53; 54; 55; 56; 57; 58; 59; 62; 63; 64; 65;
66; 67; 68; 69; 72; 73; 74; 75; 76; 77; 78; 79; 82; 83; 84; 85; 86; 87; 88; 89; 92; 93; 94; 95; 96; 97; 98; 99; 102; 103; 104; 105; 106; 107; 114O; 114P; 115; 116; 117; 120; 340; 560 |
| Lat/Long WENS | -141.0000 -50.0000 90.0000 41.7500 |
| Subjects | tectonics; glacial landforms; faults; seismicity; seismology; deglaciation; Precambrian |
| Illustrations | location maps; tables; aerial photographs; schematic models |
| Program | Public
Safety Geoscience Intraplate Earthquakes |
| Released | 2021 02 01 |
| Abstract | There is abundant evidence of high levels of seismic activity during deglaciation of Eastern Canada, suggesting that the seismic response of Eastern Canada to deglaciation is analogous to Fennoscandia,
where numerous glacially induced faults (GIF) have been confirmed. However, the Canadian record of GIFs is scant. The two probable GIFs that are described are few compared to the statistically expected amount of 100+ surface ruptures. Alternative
explanations to account for the small number of known ruptures are provided together with an interpretation of certain normal faulting that has been observed in glaciolacustrine sediments. It is recommended that interpretation of prospective GIF
features should utilize a sceptical approach employing judgemental scales that reflect data limitations and associated uncertainties. |
| Summary | (Plain Language Summary, not published)
This paper reviews evidence of glacially-induced earthquake activity in southeastern Canada and identified only two 'probable' and at best seven
'possible' examples of glacially-induced faulting over an area of ~4M km2, a far lower number than that expected from a long-term rate of background seismicity. The low number of identified glacially-induced faults partly reflects the challenges of
recognizing young, also probably subtle fault features on the Shield and Appalachian landscapes. |
| GEOSCAN ID | 322162 |
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