Providing an assessment of the amount and distribution of gas and gas hydrate that occurred in Blake Ridge sediments was the most important accomplishment of Leg 164. Estimates made using diverse and independent techniques converge to show that gas hydrates occupy ~1% to10% of the sediment volume in a zone that is at least ~250-m thick on the Blake Ridge. Site 994, a site without a BSR, contains nearly as much gas hydrate as those sites with a BSR. Apparently the BSR in this area occurs when gas saturation is achieved at the base of the gas hydrate stability field. The volume of free gas that occurs beneath the base of gas hydrate stability in this region rivals the amounts stored in the overlying section.