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You are here: Home / Library / RBINS Staff Publications / Obliquity-dominated glacio-eustatic sea level change in the early Oligocene: Evidence from the shallow marine siliciclastic Rupelian stratotype (Boom Formation, Belgium)

H.A.a Abels, S.b Van Simaeys, F.J.a Hilgen, E.c De Man and N.b Vandenberghe (2007)

Obliquity-dominated glacio-eustatic sea level change in the early Oligocene: Evidence from the shallow marine siliciclastic Rupelian stratotype (Boom Formation, Belgium)

Terra Nova, 19(1):65-73.

Our results prove that glacio-eustatic sea level oscillations in the early Oligocene were dominantly obliquity controlled with additional influence of the ∼100- and 405-kyr eccentricity cycles. This was derived from spectral analysis of resistivity records from an extended downhole section of the Boom Clay succession in Belgium, that reveals a prevailing obliquity control on the laterally persistent metre-scale alternations of shallow marine silt- and claystones in the Rupelian historical stratotype succession. These direct measurements of sea level variations in a shallow marine setting corroborate that variations with similar frequencies in benthonic oxygen isotope records from the open ocean indeed reflect, at least partly, ice volume change. A very tentative astronomical tuning has been established for the Boom Clay succession which awaits future confirmation with the addition of more accurate age calibration points. © 2007 Blackwell Publishing Ltd.

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