description Gifford Guyot Overview
Gifford Guyot is a flat-topped basaltic seamount in the Coral Sea east of Australia, associated with the Capel-Faust basins and the Lord Howe Rise. The larger guyot is dated to about 15.6 million years ago, rises from an abyssal plain roughly 3.4 kilometres below sea level, and has a summit near 250 metres below sea level. Its broad summit plateau covers about 350 square kilometres, making it a subject of bathymetric and seafloor-geology research.
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What is Gifford Guyot?
Gifford Guyot is a flat-topped basaltic seamount in the Coral Sea, on the northern Lord Howe Rise. It is part of the Lord Howe seamount chain and lies near the Capel-Faust basins. [ScienceDirect](https://www.sciencedirect.com/science/article/abs/pii/S0967064510003474)
How old is Gifford Guyot?
The larger Gifford Guyot is dated to about 15.6 million years, placing it in the Middle Miocene. Its flat summit is now capped by carbonate sediments. [ScienceDirect](https://www.sciencedirect.com/science/article/abs/pii/S0967064510003474)
How deep is Gifford Guyot?
It rises from an abyssal plain roughly 3.4 kilometers below sea level, while the flat summit is about 250 meters below the sea surface. That relief is why it is classed as a guyot rather than an ordinary cone-shaped seamount. [Gifford Guyot](https://en.wikipedia.org/wiki/Gifford_Guyot)
Why is Gifford Guyot important to marine geology?
It was mapped and sampled as part of studies of the Capel and Faust basins and the Lord Howe Rise. Geological surveys used swath mapping, camera tows, cores, and rock dredges to study the seafloor around it. [Geoscience Australia](https://www.ga.gov.au/bigobj/GA14824.pdf)
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