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| The Arabian Sea as a
marginal sea of the Indian Ocean. |
Seas
A sea is a large area of salt water which is part of an
ocean, or a large, usually salt water, closed lake (for
example, the Caspian Sea and the Dead Sea).
Sea has several definitions. A marginal sea is a
division of an ocean, partially enclosed by islands,
archipelagos, or peninsulas, adjacent to or widely open
to the open ocean at the surface, and/or bounded by
submarine ridges on the sea floor. A division of an
ocean, delineated by landforms, currents (e.g. Sargasso
Sea), or specific latitude or longitude boundaries. This
includes but is not limited to marginal seas. The World
Ocean for example, the Law of the Sea states that all of
the World Ocean is "sea" and this is also common usage
for "the sea". Any large body of water with "Sea" in the
name, including lakes. |
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An inland sea (also known as an epeiric sea or an
epicontinental sea) is a shallow sea that covers central
areas of continents during periods of high sea level
that result in marine transgressions. In modern times,
continents stand high, eustatic sea levels are low, and
there are few inland seas, the largest being Hudson Bay.
Modern examples might also include the recently (less
than 10,000 years ago) reflooded Persian Gulf, and the
South China Sea that presently covers the Sunda Shelf.
Seas which have land around them (these are landlocked) |
- Aral Sea
- Caspian Sea
- Dead Sea
- Sea of Galilee (we call this a sea,
but it is really a small freshwater lake)
- Salton Sea
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Seas which are not on Earth
Lunar maria are very big areas on the Moon. In the past,
people thought they were water and called them "seas".
Scientists think that there is liquid water under the
ground on some moons, for example Europa.
Scientists also think that there are liquid hydrocarbons
on Titan, but a better name is "lakes", not "seas". |
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