[1] Lord Howe Rise has a total area of about 1,500,000 km2 (580,000 sq mi),[1] and generally lies about 750 to 1,200 metres under water.

Some have included the 3,500 m (11,500 ft) deep New Caledonia Basin as within the rise, given its continental crust origin, and this would give a larger total area of 1,950,000 km2 (750,000 sq mi).

[4] The Lord Howe Rise is associated with seafloor spreading which also resulted in the creation of the Tasman Sea.

[4] Sandstone rocks dredged from the central Lord Howe Rise contained granite pebbles that were in the range 216–183 million years old.

One rhyolite sample has been dated at 97 million years drilled on the southern Lord Howe Rise.