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Post-glacial seasonal diatom record of the Mertz Glacier Polynya, East Antarctica.

Maddison, E.J. and Pike, J. and Leventer, A. and Dunbar, R. and Brachfeld, S. and Domack, E.W. and Manley, P. and McClennen, C. (2006) 'Post-glacial seasonal diatom record of the Mertz Glacier Polynya, East Antarctica.', Marine micropaleontology., 60 (1). pp. 66-88.


An ultra-high-resolution post-glacial laminated sediment record from Mertz Ninnis Trough, East Antarctic Margin (EAM), has been analysed using SEM backscattered electron imagery, secondary electron imagery and quantitative diatom abundance. Laminations are classified using visually dominant diatom species and terrigenous content. Four biogenic diatom ooze laminae types, one diatom-bearing terrigenous lamina type and one diatom-bearing terrigenous sub-lamina type have been identified. Diatom ooze lamina types comprise near-monogeneric Hyalochaete Chaetoceros spp. resting spore laminae, laminae characterised by Corethron pennatum, laminae characterised by Rhizosolenia spp. and mixed diatom assemblage laminae. Diatom-bearing terrigenous lamina and sub-lamina types comprise mixed diatom assemblage terrigenous laminae and sub-laminae characterised by Porosira glacialis resting spores. Formation of each of these lamina types is controlled by seasonal changes in nutrients, oceanographic regimes and the Mertz Glacier Polynya dynamics.

Item Type:Article
Keywords:Mertz Ninnis Trough, Mertz Glacier Polynya, Seasonality, Diatoms, Laminated, East Antarctica.
Full text:Full text not available from this repository.
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Date accepted:No date available
Date deposited:No date available
Date of first online publication:June 2006
Date first made open access:No date available

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