Ottawa-Bonnechere Graben | |
|---|---|
 Map of the Ottawa-Bonnechere and Timiskaming grabens | |
| Location | Ontario and Quebec, Canada |
| Part of | Saint Lawrence rift system |
| Age | Late Proterozoic to Early Paleozoic |
| Geology | Graben |
| Dimensions | |
| • Length | 700 km (435 mi) |
The Ottawa-Bonnechere Graben (also known as the Ottawa Graben) is a geological structure that coincides with a 55 km (34 mi) wide topographic depression extending from near Montréal through Ottawa. It is part of the Saint Lawrence rift system that also includes the seismically active Saguenay graben.[1] This rift valley was formed when the Earth's crust moved downward about a kilometre between two major fault zones known as the Mattawa and Petawawa faults.[2]
- ^ Rimando, Rolly E.; Benn, Keith (2005). "Evolution of faulting and paleo-stress field within the Ottawa graben, Canada". Journal of Geodynamics. 39 (4): 337–360. Bibcode:2005JGeo...39..337R. doi:10.1016/j.jog.2005.01.003.
- ^ Cite error: The named reference
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