Unknown
PANGAEA
In:
Supplement to: Prueher, Libby M; Rea, David K (2001): Volcanic triggering of late Pliocene glaciation: evidence from the flux of volcanic glass and ice-rafted debris to the North Pacific Ocean. Palaeogeography, Palaeoclimatology, Palaeoecology, 173(3-4), 215-230, https://doi.org/10.1016/S0031-0182(01)00323-6
Publication Date:
2024-01-09
Description:
Mass accumulation rates (MAR) of different components of North Pacific deep-sea sediment provide detailed information about the timing of the onset of major Northern Hemisphere glaciation that occurred at 2.65 Ma. An increase in explosive volcanism in the Kamchatka-Kurile and Aleutian arcs occured at this same time, suggesting a link between volcanism and glaciation. Sediments recovered by piston-coring techniques during ODP Leg 145 provide a unique opportunity to undertake a detailed test of this possibility. Here we use volcanic glass as a proxy for explosive volcanism and ice-rafted debris (IRD) as a proxy for glaciation. The MAR of both glass and IRD increase markedly at 2.65 Ma. Further, the flux of the volcanic glass increased just prior the flix of ice-radted material, suggesting that the cooling resulting from explosive volcanic eruptions may have been the ultimate trigger for the mid-Pliocene glacial intensification.
Keywords:
145-882; 145-883; 145-887; COMPCORE; Composite Core; Joides Resolution; Leg145; North Pacific Ocean; Ocean Drilling Program; ODP
Type:
Dataset
Format:
application/zip, 3 datasets
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