Términos

Narrow breaks in ridges on the sea floor.

Hills on the sea floor with elevations, usually rising less than 500 meters.

Small depressions on the sea floor.

Hills on the sea floor, usually rising more than 500 meters and less than 1,000 meters, and with limited extent across summits.

Geomorphic features of the earth's surface that are located below the sea.

Rocky projections or outcroppings on the sea floor, usually located near shore.

Embankments found near undersea canyons, valleys, or seachannels.

Axial depressions of the mid-oceanic ridge system.

Depressions that may not be continuous, located at the base of many seamounts, islands, and other isolated undersea landforms.

Low rounded hills located on the sea floor.

Mountain ranges located beneath of the surface of the ocean.

Prominent elevations, typically pointed, located beneath the surface of the ocean.

High, narrow, tower-like formations of rock or coral, located beneath the surface of the ocean.

Flat, gently sloping regions located beneath the surface of the ocean.

Flat or gently sloping underwater surfaces, extending seaward from shorelines.

Gentle slopes located on the sea floor, which connect areas of varying elevations. [For PH - no add'l warrant for "undersea ramps" though some warrant for "submarine ramps."]

Series of associated undersea ridges or seamounts.

Small canyons, located on the sea floor.

Long narrow elevations with steep sides, located on the sea floor.

Broad elevations on the sea floor that gently rise.