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USGS CMG InfoBank: Guyots

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Comment: 11:06 - 12:06 (01:00)
Source: Annenberg/CPB Resources - Earth Revealed - 5. The Birth of a Theory
Keywords: "Harry H. Hess", "Robert Dietz", "Gary Ernst", guyot, "wave erosion", island, subsidence, crust, "sea floor spreading", "mid-Atlantic ridge", upwelling, mantle, "mid-oceanic ridge", convection

Our transcription: Hess and a colleague, Robert Dietz, suggested that "guyots" are, in fact, wave eroded islands, which submerge as the crust beneath them subsides.
To account for this subsidence, they proposed a radical new theory, which they called "sea floor spreading."
Harry Hess had a bold imaginative concept, which he enunciated in 1962.
It stated that the newly found mid-Atlantic ridge was actually the site of upwelling mantle beneath the ridge, and that is it solidified.
The melts derived from it solidified at the ridge, they were carried laterally piggy-back away from the ridge, much as the froth in a pot of convecting stew would be carried away from the central up welling current.

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