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Physical geography Reference Libraries

Page 9 of about 102 Articles
Alcyoniidae
2012-04-03 14:15:16

Alcyoniidae is a family of leathery corals that occur globally in temperate and tropical seas. These reef dwellers are often found in wave-exposed areas of reef crests, less turbid waters in lagoons, on steep slopes, under overhangs, and at depths of 100 feet and deeper. A colony of leathery coral is stiff, hard, and inflexible. It is composed of tiny polyps projecting from a shared...

Saichania
2010-09-16 16:42:25

Saichania, meaning "beautiful one", is a genus of ankylosaurid dinosaur from the Late Cretaceous Period. It was discovered in the Barun Goyot Formation in the Nemegt Basin, southern Mongolia. The type species is S. chulsanensis. Saichania was described in 1977 by Teresa Maryańska. They type specimen consists of a skull and the anterior part of the postcranial skeleton, including neck...

Nomingia
2010-02-03 16:14:24

Nomingia is a genus of theropod dinosaur from the Late Cretaceous Period. It was discovered in the Bugin Tsav Beds around the Gobi Desert. It is named for the Nomingiin Gobi, which is part of the nearby Gobi Desert. It was described in 2000 based on several skeletal fragments. The type species is N. gobiensis. Nomingia was a medium-sized theropod with beaked jaws and possibly a display...

Drainage Divide
2009-07-06 18:07:31

A drainage divide, water divide, divide, or watershed is the line that separates neighboring drainage basins. In flat country the divide may be invisible (just a notional line on the ground either side of which water starts its journey to different waterways). While, in hilly country, the divide lies along peaks and ridges. Drainage divides are important geographical, and sometimes political...

Water Cycle
2009-07-06 17:58:20

The water cycle (or hydrologic cycle) describes the continuous movement of water above, below, and on the planet. Since the water cycle is in fact a "cycle", there is no beginning or end. Water exists in three states: liquid, vapor, and ice. Although the balance of water on our planet is fairly constant, individual water molecules may come and go. The water cycle is driven by the sun. The sun...

Meltwater
2009-07-06 17:15:30

Meltwater is water that is released from melting snow or ice. This includes meltwater from glacial ice and ice shelves over oceans. Meltwater is often produced during volcanic eruptions, and can cause dangerous lahars (landslides of wet volcanic debris). When meltwater pools on the surface rather than draining or flowing away, it forms pools known as melt ponds. Meltwater will often refreeze as...

Sky Islands
2009-07-04 14:40:55

Sky Islands are mountains located within ranges that are isolated by valleys in which other ecosystems are located. As a result, mountain ecosystems are isolated from each other, and species can develop separately, as occurs on island groups such as the Galápagos Islands. The best known example of sky islands are the northern end of the Sierra Madre Occidental in New Mexico, Arizona,...

Neotropic Ecozone
2009-07-01 13:41:09

The Neotropic ecozone is one of Earth's eight ecosystems. This ecozone is also known as the Neotropical ecozone. It is made up of South and Central America, the Mexican lowlands, Caribbean Islands, and southern Florida. The southernmost part of South America is part of the Antarctic ecosystem. Many of the regions included in the Neotropic share the same diversity among plant and animal life....

Indomalaya Ecozone
2009-07-01 12:56:43

The Indomalaya ecozone is one of Earth's eight ecosystems. It covers most of South and Southeast Asia and parts of East Asia. This area was originally known as the Oriental Region by most scientists (especially biogeographers). Indomalaya extends from Afghanistan to Pakistan through the Indian subcontinent and Southeast Asia to southern China, and through Indonesia toward Java, Bali, and...

Pink Pigeon Columba mayeri
2009-06-04 23:10:27

The Pink Pigeon (Columba mayeri) is a species of bird of the Columbidae family, which includes doves and pigeons. It is endemic to Mauritius and is very rare. It is found only on the Mascarene Island of Mauritius. Once being found on the larger Reunion Island, it is now extinct there. It is found in patches of forest in the National Park area to the southwest, and in the nature reserve Ile aux...

Word of the Day
bellycheer
  • Good cheer; viands.
  • To revel; to feast.
The word 'bellycheer' may come from 'belle cheer', "good cheer".
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