10.1594/PANGAEA.723883Moore, Theodore CTheodore CMoorePANGAEA2008Event labelLatitude of eventLongitude of eventElevation of eventDepth, top/minLayer thicknessAge, minimum/youngAge, maximum/oldDepth, bottom/maxDifferenceAge, datedDrilling/drill rigComposite CoreLeg5Leg7Leg15Leg16Leg17Leg18Leg20Leg21Leg30Leg31Leg32Leg33Leg35Leg61Leg62Leg67Leg85Leg129Leg130Leg138Leg167Leg192Leg199Leg201Leg202Leg206Glomar ChallengerJoides ResolutionDeep Sea Drilling Project (DSDP)Ocean Drilling Program (ODP)1969-04-23T00:00:00/2002-11-14T00:00:00Supplementary Dataset10.1130/G25057A.1ftp://rock.geosociety.org/pub/reposit/2008/2008243.pdf408 data pointstext/tab-separated-valuesCreative Commons Attribution 3.0 UnportedEvidence for the dissolution of biogenic silica at the base of pelagic sections supports the hypothesis that much of the chert formed in the Pacific derives from the dissolution and reprecipitation of this silica by hydrothermal waters. As ocean bottom waters flow into and through the crust, they become warmer. Initially they remain less saturated with respect to dissolved silica than pore water in the overlying sediments. With the diffusion of heat, dissolved ions, and to some extent the advection of water itself, biogenic silica in the basal part of the sedimentary section is dissolved. Upon conductively cooling, these pore waters precipitate chert layers. The most common thickness for the basal silica-free zone (20 m) lies below the most common height of the top of the chert interval above basement (50 m). This mode of chert formation explains the frequent occurrence of chert layers at very shallow subbottom depths in pelagic sections of the Pacific. It is also consistent with the common occurrence of cherts </=150 m above basement.Supplement to: Moore, Theodore C (2008): Biogenic silica and chert in the Pacific Ocean. Geology, 36(12), 975-978124.6508-69.35579999999999-63.680739.9618North Pacific/PLAINNorth Pacific/BASINCaribbean Sea/BASINCaribbean Sea/CONT RISESouth Pacific/RIDGENorth Pacific/RIDGENorth Pacific/CONT RISENorth Pacific OceanNorth Pacific/GUYOTNorth Pacific/SLOPESouth Pacific/Tasman Sea/CONT RISESouth Pacific/PLATEAUNorth Pacific/Philippine Sea/TRENCHNorth Pacific/Philippine Sea/CONT RISENorth Pacific/FANAntarctic Ocean/PLAINNorth Pacific/TRENCHSouth Pacific Ocean