Sea ice terminology. Describes any relatively flat piece of ice that is 20 m or more across. Floes are subdivided according to their horizontal extent, as follows: Small: 20 m - 100 m across, Medium:
101 m - 500 m across, Big: 501 m - 2000 m across, Vast: 2001 m - 10 km across, Giant: Greater than 10 km across.
A piece of floating ice other than fast ice or glacier ice. Floes are subdivided by size as follows: ice cakes are less than 20 m across; small floes 20-100 m; medium floes 100-500 m; big floes 500 m-
2 km; vast floes 2-10 km; giant floes over 10 km.
Sea ice terminology, describing a massive piece of ice composed of a hummock or a group of hummocks, frozen together and separated from any surrounding ice. They may typically protrude up to 5 m above
water level.
A mass of hummocked ice, formed by the piling up of many ice floes by lateral pressure; an extreme form of pressure ice. It may be more than 50 ft high and resemble an iceberg.
A massive piece of sea ice composed of a hummock or a group of hum- mocks, frozen together and separated from any ice surroundings. It may float up to 17 ft (5 m) above sea level.
A massive piece of sea ice composed of a hummock, or a group of hummocks frozen together, presenting a separate floating ice fragment in ice-free water or among separate ice fragments. It may protrude
up to 5 m above sea-level.
A flood basalt or trap basalt is the result of a giant volcanic eruption or series of eruptions that coats large stretches of land or the ocean floor with basalt lava. Flood basalts have occurred on c
ontinental scales (large igneous provinces) in prehistory, creating great plateaus and mountain ranges. [Wikipedia]