Table 1. Summary of conditions at...

Table 1.

Summary of conditions at selected sites with gassy soils

Site	Gassy offshore sediments	Fraser River Delta	Athabasca Oil Sands	Sarnia, Ontario vicinity
Location	Offshore (deltaic and marine)	Offshore (deltaic)	Onshore	Onshore
Soil type	Fine-grained, underconsolidated to normally consolidated	Loose sands	Overconsolidated sands	Fine-grained, normally consolidated to overconsolidated
Gas source	Biogenic	Biogenic	Petrogenic	Petrogenic
Implications of concern	Slope instability, consolidation behaviour	Slope instability due to tidal unloading or seismic events	Slope instability due to mining oil sands	Slope instability due to excavations
Selected references	3–5	6–8	9, 10	1, 2

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