Mare Imbrium

Mare Imbrium (Latin for "Sea of Showers" or "Sea of Rains") is a vast lunar mare filling a basin on the Moon. One of the larger craters in the Solar System, Mare Imbrium formed when lava flooded the giant crater formed when a very large object hit the Moon long ago. Its age has been estimated using U-Pb dating methods to 3938 ± 4 Ma. The Moon's maria (plural of mare) have fewer features than other areas of the Moon because molten lava pooled in the craters and formed a relatively smooth surface. Mare Imbrium is not as flat as it was originally because later events have altered its surface.

Characteristics

With a diameter of 1146 km, Mare Imbrium is second only to Oceanus Procellarum in size among the maria, and it is the largest mare associated with an impact basin.

The Imbrium Basin is surrounded by three concentric rings of mountains, uplifted by the colossal impact event that excavated it. The outermost ring of mountains has a diameter of 1300 km and is divided into several different ranges; the Montes Carpatus to the south, the Montes Apenninus to the southeast, and the Montes Caucasus to the east. The ring mountains are not as well developed to the north and west, and it appears they were simply not raised as high in these regions by the Imbrium impact. The middle ring of mountains forms the Montes Alpes and the mountainous regions near the craters Archimedes and Plato. The innermost ring, with a diameter of 600 km, has been largely buried under the mare's basalt leaving only low hills protruding through the mare plains and mare ridges forming a roughly circular pattern.

Mare

A mare is an adult female horse or other equine.

In most cases, a mare is a female horse over the age of three, and a filly is a female horse age three and younger. In Thoroughbred horse racing a mare is defined as a female horse more than four years old, but the word can also be used for other female equine animals, particularly mules and zebras, though a female donkey is usually called a "jenny." A broodmare is a mare used for breeding. A horse's female parent is known as its dam.

An uncastrated adult male horse is called a stallion and a castrated male is a gelding. Occasionally the term "horse" is used in a restrictive sense to designate only a male horse.

Reproductive cycle

Mares carry their young (called foals) for approximately 11 months from conception to birth. (Average range 320–370 days.) Usually just one young is born; twins are rare. When a domesticated mare foals, she nurses the foal for at least four to six months before it is weaned, though mares in the wild may allow a foal to nurse for up to a year.

Dark ambient

Dark ambient (in the 1980s also referred to as ambient industrial) is a genre of post-industrial music that features foreboding, ominous, or discordant overtones, some of which were heavily inspired by elements of ambient music. The term was coined in the early 1990s by Roger Karmanik to describe the music of Raison d'être and is strongly associated with the Cold Meat Industry record label.

Origins and development

Dark ambient has its roots in the 1970s, with the introduction of newer, smaller, and more affordable effects units, synthesizer and sampling technology. Early genre elements can be found on Throbbing Gristle's 1978 album D.o.A: The Third and Final Report of Throbbing Gristle. Important early precursors of the genre were Tangerine Dream's early double-album Zeit (1972), which was unlike most of their subsequent albums in abandoning any notion of rhythm or definable melody in favour of "darkly" sinuous, occasionally disturbing sonics, and also Affenstunde (1970) by fellow krautrock band Popul Vuh.