Table 1. Summary of results of prior CORKs in accretionary settings.

	Barbados Ridge (Hole 949C)	Oregon Margin (Hole 892B)
Zone monitored	Décollement at ~400 mbsf nearly spanned by screened section	Thrust fault that intersects BSR updip; at site, BSR behind casing ~40 m shallower than thrust fault
Period monitored	3.5 years: July 1994--Jan. 1998	2 years: Nov. 1992--Nov. 1994
In situ pressures	1.02 MPa stable overpressure (<~3MPa lithostatic)	Very low P (13kPa) Higher P drained at drilling?
In situ temperatures	Stable at geothermal gradient	Stable, but transient event in fault
Fluid flow transients?	No significant natural transients - pressure transients due to pump testing and LWD	Warming of thermistor in fault zone indicated transient upfault flow of warm fluids
Hydrological testing	Permeability varies several magnitudes with effective stress (Screaton et al., 1995, 1997; Fisher and Zwart, 1996)
Fluid sampling	Despite high P, low permeability prohibited fluid production at valve	No, low P; later produced gas hydrates, after data logger removed
Tidal loading - attenuation	85% of seafloor amplitude, consistent with muddy sediments of 60% porosity above décollement	More attenuated, consistent with more cemented, lithified formation
Tidal loading - phase	Dispersive phase lag - requires weak formation outside screened interval, later verified with LWD	Slight phase lead confirmed presence of free gas
Main citation	Becker et al., 1997	Davis et al., 1995