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Physical geography Reference Libraries

Page 8 of about 103 Articles
Ocean Terms
2012-07-23 11:11:02

Warm Eddy- is an area of water that is made up of warm water and is surrounded by areas of colder water. The north side of the Gulf Stream is a very popular place to find these types of eddies as they form when the water gets cut off from the main Gulf Stream current and just sits and spins in the colder water until it’s replaced by colder water. Cold Eddy- is an area of water that is made...

The Gulf Stream Ocean Current
2012-07-16 15:25:39

Image Credit: F-5 Weather Data The Gulf Stream is a warm ocean current that travels from the East Coast of Florida all the way northward along the Eastern Seaboard until it gets near North Carolina and Virginia then it starts to make its way back eastward out to sea. The significant impact of this ocean current, as you can see in the image above, is that the waters are warm and this...

Xestospongia testudinaria
2014-01-05 00:00:00

Xestospongia testudinaria is a species of barrel sponge in the Petrosiidae family. It is found in the Philippines, Australia, western and central Indian Ocean, Indonesia, Malaya, and New Caledonia. This species ranges in size from 3.9 to 7.9 inches in length and 3.9 to 7.9 inches in diameter in intertidal zones. It is maroon to pink, with the opening of the barrel pale white. Specimens are...

Idaho Ground Squirrel Urocitellus brunneus
2012-04-23 06:30:00

The Idaho ground squirrel (Urocitellus brunneus), also called the Idaho Spotted ground squirrel, is one of the largest of the ground squirrel breed. It has two subspecies, both located in Idaho. Both the northern and southern Idaho ground squirrels have a sexual diphorism, where the males are usually larger than the females. This ground squirrel species generally weighs between .3 pounds and .4...

Siderastreidae
2012-04-03 19:03:15

Siderastreidae is a family of colonial, reef building stony corals. Members of this family include symbiotic algae in their tissues which help provide their energy requirements. The World Register of Marine Species lists 7 genera within this family: Anomastraea, Coscinaraea, Craterastrea, Horastrea, Psammocora, Pseudosiderastrea, and Siderastrea. Corals in this family vary in form and...

Horn Corals
2012-04-03 18:06:52

Horn corals, known as Rugosa or Tetracoralla, are an extinct order of coral that were abundant during the Middle Ordovician to Late Permian stages. They were known as horn corals because of a unique horn-shaped chamber with a wrinkled (rugose) wall. These mostly solitary corals often reached lengths of nearly 40 inches. However, some species could form large colonies. Rugose corals...

Tabulata
2012-04-03 17:00:56

Tabulata is a family of extinct tabulate corals. These corals lived entirely during the Paleozoic era, being found from the Ordovician to the Permian stages. There are about 300 known genera of tabulate corals, of which Aulopora, Favosites, Halysites, Heliolites, Pleurodictyum, Sarcinula and Syringopora are the most common in the fossil record. These corals were mostly found in the shallow...

Frogspawn
2012-04-03 14:56:39

Frogspawn, (Euphyllia divisa), is a species of stony coral native to the Indo-Pacific islands. The related coral E. paradivisa is sometimes misidentified as frogspawn leading to some confusion. E. divisa has a corallite skeleton with a flabello-meandroid (continuous skeletal) “wall” structure, whereas E. paradivisa has a tree-like branching structure with separate corallites. Frogspawn...

Plate Coral
2012-04-03 14:30:21

Plate Coral, (Fungia paumotensis), is a species of stony coral that occurs in the Indian Ocean on upper reef slopes especially where there is considerable movement of the water from wave action. It is usually found on sand or beds of coral fragments. This solitary, non-colonial coral is free living and not attached to the seabed. It is elongated and oval in shape and can grow rather large....

Astrocoeniidae
2012-04-03 14:18:34

Astrocoeniidae is a family of stony corals endemic to the waters around Papua New Guinea and northern Australia. Their habitats are steep slopes where strong currents rise from below, in crevices and below overhangs. These are reef-building colonial corals containing an algae known as zooxanthallae. These algae typically encrust corals up to 20 inches in diameter. On reef slopes, where...

Word of the Day
whirret
  • To give a box on the ear to.
The word 'whirret' may be onomatopoeic.