I'm a little confused about the inter-changeability of these terms in a marine sedimentation context. My understanding is as follows:
Glaciogenic sedimentation = sedimentation derived from glaciers (or ice-sheets)
Glacimarine sedimentation = sedimentation derived from glaciers (or ice-sheets) that calve directly into the marine environment.
If this is correct then glacimarine sedimentation is a subset of glaciogenic and either of the terms could be used when referring to an ice-sheet that extends into the sea.
Can anybody provide some clarification?
I don't think you need any clarification, your succinct definition is right on the mark. In "Glacimarine Environments: Processes and Sediments," Dowdeswell and Scourse (1990) defined glacimarine as "all those areas where sediment is deposited in the sea after release from glacier ice (including tidewater ice fronts, floating glacier tongues, ice shelves and icebergs) or sea ice." Since marine basins are more highly represented in the geologic record, even though this can be indeed be considered a subset of glacigenic, it is an important area of study. The book "Climate Modes of the Phanerozoic" (Frakes, Francis, and Syktus, 1992) is full of references to using marine sediments with increases or decreases of ice-carried dropstones as a proxy for ice-volume change.
Thank you Matthew for asking the question and thank you Kevin for the information.
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