10.1594/PANGAEA.759588
Pospichal, James J
James J
Pospichal
Dehn, Jonathan
Jonathan
Dehn
Driscoll, Neal W
Neal W
Driscoll
van Eijden, AJM
AJM
van Eijden
Farrell, John W
John W
Farrell
Fourtanier, Elisabeth
Elisabeth
Fourtanier
Gamson, Paul
Paul
Gamson
Gee, Jeff S
Jeff S
Gee
Janecek, Thomas R
Thomas R
Janecek
Jenkins, D Graham
D Graham
Jenkins
Klootwijk, Christian T
Christian T
Klootwijk
Nomura, Ritsuo
Ritsuo
Nomura
Owen, Robert M
Robert M
Owen
0000-0003-4583-794X
Rea, David K
David K
Rea
Resiwati, Purtyasti
Purtyasti
Resiwati
Smit, Jan
Jan
Smit
0000-0002-6070-4865
Smith, Guy M
Guy M
Smith
Cretaceous-Paleogene biomagnetostratigraphy of ODP Leg 121 sites
PANGAEA
1991
Composite Core
Drilling/drill rig
Leg121
Joides Resolution
Ocean Drilling Program (ODP)
1988-05-10T00:00:00/1988-05-24T07:30:00
en
Supplementary Publication Series of Datasets
10.2973/odp.proc.sr.121.181.1991
6 datasets
application/zip
Creative Commons Attribution 3.0 Unported
Broken Ridge, in the eastern Indian Ocean, is a shallow-water volcanic platform which formed during the Early to middle Cretaceous at which time it comprised the northern portion of the Kerguelen-Heard Plateau. Rifting during the middle Eocene and subsequent seafloor spreading has moved Broken Ridge about 20 infinity N to its present location. The sedimentary section of Broken Ridge includes Turonian-lower Eocene limestone and chalk with volcanic ash, an interval of detrital sands and gravels associated with middle Eocene rifting and uplift, and a middle-late Oligocene unconformity overlain by a thin section of Neogene-Holocene pelagic calcareous ooze. This paper summarizes the available post-cruise biostratigraphic and magnetostratigraphic data for the Cretaceous-Paleogene section on Broken Ridge. The synthesis of this information permits a more precise interpretation of the timing of events in the history of Broken Ridge, in particular the timing and duration of the middle Eocene rifting event. Paleontologic data support rapid flexural uplift of Broken Ridge in response to mechanical rather than thermal forces. Other highlights of the section include a complete Cretaceous/Tertiary boundary and an opportunity for first-order correlation of Paleogene diatom stratigraphy with that of the calcareous groups.
Supplement to: Pospichal, James J; Dehn, Jonathan; Driscoll, Neal W; van Eijden, AJM; Farrell, John W; Fourtanier, Elisabeth; Gamson, Paul; Gee, Jeff S; Janecek, Thomas R; Jenkins, D Graham; Klootwijk, Christian T; Nomura, Ritsuo; Owen, Robert M; Rea, David K; Resiwati, Purtyasti; Smit, Jan; Smith, Guy M (1991): Cretaceous-Paleogene biomagnetostratigraphy of Sites 752–755, Broken Ridge: a synthesis. In: Weissel, J; Peirce, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 121, 721-741
93.5467
93.5899
-31.03
-30.839
South Indian Ridge, South Indian Ocean