Bathypelagic Zone: The zone of the ocean that extends from 1000m to 4000m below the surface of the ocean. Visit the Bathypelagic Zone on oceanlink for pictures and cool facts about life at this depth.

 

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Bathypelagic Zone: The zone of the ocean that extends from 1000m to 4000m below the surface of the ocean. Visit the Bathypelagic Zone on oceanlink for pictures and cool facts about life at this depth.

Target Zone Arrangement: In the context of takeovers, the price at which an acquirer aims to buy a target firm. In the context of options, the price of the underlying security at which an option will become in the m . . . View Full Definition

Target Heart Rate Zone: The number of heartbeats per minute reflecting the exercise intensity that gains the maximum training benefits from an aerobic workout. The formula for obtaining a target heart rate equals 2 . . . View Full Definition

Surf Zone: An area of breaking waves bounded by the point of first breakers, then landward to the maximum uprush of waves on the beach.

Sunlight Zone: See Photic Zone.

Twilight Zone: See Mesopelagic Zone.

Wrack Zone: A bank of accumulated litter at the strandline

Wash Zone: The depth zone in which sediments are disturbed by wave action near the shoreline

Vadose Zone: The region in the ground between the surface and the water table in which pores are not filled with water. Also called the unsaturated zone.

Subduction Zone: An area at a convergent plate boundary where an oceanic plate is being forced down into the mantle beneath another plate. These can be identified by a zone of progressively deeper earthquakes.