description Brisbane Guyot Overview
Brisbane Guyot is a flat-topped seamount in the Coral Sea. As a guyot, it is an underwater volcanic mountain whose summit has been levelled by erosion and later submerged, leaving a broad, relatively flat top below sea level. The feature is associated with ancient shallow-water reef development and volcanic foundations, and its name refers to Brisbane, Australia.
help Brisbane Guyot FAQ
Where is Brisbane Guyot located?
Brisbane Guyot is a flat-topped seamount in the Coral Sea. Australian marine mapping places it among the Queensland Guyot and Tasmantid seamount features. [Australian Government marine profile](https://www.agriculture.gov.au/sites/default/files/documents/bioregional-profile.pdf)
What is a guyot?
A guyot is an underwater volcanic mountain whose summit has been flattened by erosion and later submerged. Brisbane Guyot is therefore a geological feature below sea level, not a normal mountain on land.
Why is Brisbane Guyot flat on top?
Its summit was levelled when the volcanic mountain stood in shallower water, then the feature sank or was submerged. That erosion-and-submergence history is the defining mechanism behind a guyot.
Is Brisbane Guyot an island?
No, it is a submerged seamount in the Coral Sea. Its flat top records an ancient shallow-water stage, but the present feature lies underwater.
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