Glacially-influenced sediment drifts in the Rockall Trough

Stoker, Martyn S.; Howe, John A.. 1997 Glacially-influenced sediment drifts in the Rockall Trough. In: Davies, Thomas A.; Bell, Trevor; Cooper, Alan K.; Heiner, Josenhans; Polyak, Leonid; Solheim, Anders; Stoker, Martyn S.; Stravers, Jay A., (eds.) Glaciated continental margins: an atlas of acoustical images. London, UK, Chapman and Hall, 290-293.

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Sediment drifts are a major depositional product of bottom-current activity in deep-water settings, particularly on slopes and basin plains within, and adjacent to, continental margins. They commonly form positive features on seismic reflection profiles. Bottom-current reworking of sediment, which may be derived from turbidity currents or pelagic/hemipelagic processes, is the major factor controlling the development of sediment drifts. In the vicinity of glaciated margins they are also likely to receive an input of coarse-grained material, including gravel-sized dropstones, derived through ice-rafting processes. Thus, despite subsequent bottom-current reworking, a distinct glacimarine signature will be retained within the sediments. Such deposits form an important component of the late Cenozoic sediment drifts in the northeast Rockall Trough (Fig. 1), where a record of distal glacimarine sedimentation, since the late Pliocene, is preserved [Stoker et al., 1993].

Item Type: Publication - Book Section
Digital Object Identifier (DOI):
Programmes: BAS Programmes > Pre 2000 programme
BGS Programmes > Other
Date made live: 04 Oct 2016 10:08 +0 (UTC)

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