. The Earth beneath the sea : History . - 2a 10° 15' 10°15' CHUBASCO SPECIAL AREA CONTOUR INTERVAL ID FATHOMS 3 NAUTICAL MILES Fig. 41. Topography of area around stations Chub 8, 9, 10 and 11 in North Equatorial clay facies. (Dashed Hnes indicate the sounding track.) At stations 9 and 10 on the topographic high the Tertiary clay formation is covered only by about 40 cm of Quaternary. The cores 8 and 11, however, which are 160 and 175 cm long respectively, do not penetrate through the Quaternary formation in the valley bottom. The simi- larity in stratification between cores 8 and 11 suggests t
. The Earth beneath the sea : History . - 2a 10° 15' 10°15' CHUBASCO SPECIAL AREA CONTOUR INTERVAL ID FATHOMS 3 NAUTICAL MILES Fig. 41. Topography of area around stations Chub 8, 9, 10 and 11 in North Equatorial clay facies. (Dashed Hnes indicate the sounding track.) At stations 9 and 10 on the topographic high the Tertiary clay formation is covered only by about 40 cm of Quaternary. The cores 8 and 11, however, which are 160 and 175 cm long respectively, do not penetrate through the Quaternary formation in the valley bottom. The simi- larity in stratification between cores 8 and 11 suggests that the greater thickness of the Quaternary formation in the valley is not caused by slumping. The abnormal thinness of the Quaternary strata on the slope and crest of the hill consequently appears to be due either to a persistently lower rate of accumulation or to a period of non-deposition represented by the Tertiary-Quaternary unconformity. (From Bramlette and Arrhenius, unpublished; topographic survey by R. L. Fisher.)
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Keywords: ., bookcentury1900, bookcollectionbiodivers, booksubjectoceanbottom
