Rock (geology)

In geology, rock or stone is a naturally occurring solid aggregate of one or more minerals or mineraloids. For example, the common rock granite is a combination of the quartz, feldspar and biotite minerals. The Earth's outer solid layer, the lithosphere, is made of rock.

Rocks have been used by mankind throughout history. From the Stone Age, rocks have been used for tools. The minerals and metals found in rocks have been essential to human civilization.

Three major groups of rocks are defined: igneous, sedimentary, and metamorphic. The scientific study of rocks is called petrology, which is an essential component of geology.

Classification

At a granular level, rocks are composed of grains of minerals, which, in turn, are homogeneous solids formed from a chemical compound that is arranged in an orderly manner. The aggregate minerals forming the rock are held together by chemical bonds. The types and abundance of minerals in a rock are determined by the manner in which the rock was formed. Many rocks contain silica (SiO₂); a compound of silicon and oxygen that forms 74.3% of the Earth's crust. This material forms crystals with other compounds in the rock. The proportion of silica in rocks and minerals is a major factor in determining their name and properties.

Glossary of numismatics

This article is a collection of Numismatic and coin collecting terms with concise explanation for the beginner or professional.

Numismatics (ancient Greek: νομισματική) is the scientific study of money and its history in all its varied forms. While numismatists are often characterized as studying coins, the discipline also includes the study of banknotes, stock certificates, medals, medallions, and tokens (also referred to as Exonumia).

Sub-fields or related fields of numismatics are:

A

B

C

D

E

F

G

H

I

K

L

M

N

O

P

Q

R

S

T

U

V

Y

Z

References

Model 500 telephone

The Western Electric model 500 telephone series was the standard domestic desk telephone set issued by the Bell System in North America from 1950 through the 1984 Bell System divestiture. Millions of model 500-series phones were produced and were present in most homes in North America. Many are still in use today because of their durability and ample availability. Its modular construction compared to previous types simplified manufacture and repair, and facilitated a large number of variants with added features.

Touch-tone service was introduced to residential customers in 1963 with the model 1500 telephone, which had a push-button pad for the ten digits. The model 2500 telephone, introduced in 1968, added the * and # keys, and is still in production today by several manufacturers.

History

The Western Electric 500-type telephone replaced the 300-type which had been produced since 1936. Like its predecessor, the model 500 line was designed by the firm of industrial designer Henry Dreyfuss, the product of several years of research and testing in collaboration with Bell Laboratories and Western Electric. Development started in 1946 and lead to pre-production units in 1948 and field trials with 4000 telephone sets in 1949. AT&T announced the new telephone publicly in 1949, and communicated the first availability of approximately 23,000 sets in the second quarter 1950 to the Bell System operating companies on May 1, 1950. Third and fourth quarter production was estimated at 49,000 and 93,000, respectively. Including 20,000 units of a special purpose set (501B), approximately 183,000 units were produced by the end of the first production year.

Type 59

Type 59 may refer to:

Rock (rapper)

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Jamal Bush (born November 4, 1975), better known by his stage name Rock (or Big Rock, or alternatively The Rockness Monstah), is an American rapper, famous as a member of hip hop collective Boot Camp Clik and the duo Heltah Skeltah along with Sean Price. He is known for his deep, grimy voice and having a sophisticated and rugged flow.

After releasing two albums with Heltah Skeltah, Nocturnal and Magnum Force, Rock left Duck Down Records and pursued a solo career. He signed to DJ Lethal's Lethal Records and recorded a solo album titled Planet Rock, which was never released after the label folded. He didn't make an appearance on the Clik's 2002 group album The Chosen Few, being the only member of the "Great 8" not to appear.

He made his official return to Duck Down in 2005, making appearances on Sean Price's Monkey Barz album and Smif-N-Wessun's Smif 'N' Wessun: Reloaded album. He's performed songs for a variety of video games including "I Am Rock" for Need for Speed: Most Wanted, "This Is Me" for Blitz The League II and "I Am Rock" for NFL Street 2. He and the Boot Camp released their third group album, The Last Stand, on July 18, 2006.

List of Soul characters

A comprehensive list of characters from the Soul series of fighting games produced by Namco.

Overall conception and development

The Soul series is a weapon-based fighting game franchise developed by Namco Bandai's Project Soul division and consists of eight games: Soul Edge, Soulcalibur, Soulcalibur II, Soulcalibur III, Soulcalibur Legends, Soulcalibur IV, Soulcalibur: Broken Destiny and Soulcalibur V. Set in the 16th century, the plot of the games revolve around Soul Edge, a cursed sword able to possess its wielder and devour souls. Its sprit is called Inferno, and his avatar/host is called Nightmare. Soul Calibur, a holy sword and Soul Edge's antithesis, also has a spirit called Elysium.

Characters

With each character, their weapon was decided upon before other aspects were. The design was then built to revolve around it, starting with gender, then physical measurements, and lastly background details. Once established, appearance and movement were fleshed out by the team's concept artist and rendered as a 3D model by a design team that worked solely on the character. The completed model was then animated by a motion capture artist working directly with the team. During this phase the team additionally worked with the story creators, refining the character's own role in the plot as needed throughout development. In the course of the series, two characters have been an exception to the process: Johan Druer, a berserker exclusive to the Soulcalibur Japanese player's guide, and Necrid, a character co-produced with Todd McFarlane that appears in Soulcalibur II.

Plymouth Rock chicken

The Plymouth Rock is a breed of domestic chicken from the United States. It originated in New England in the 19th century from cross-breeding of Dominiques and Black Javas.

History

The Plymouth Rock was developed in New England in the early 1800s by crossing Dominiques and Black Javas.. John C. Bennett (1804–1867) has been credited with either creating or popularizing the breed.

Colors

In the United States, the United Kingdom and Canada, seven color varieties of the Plymouth Rock are recognized: Barred, Blue, Buff, Columbian, Partridge, Silver-penciled and White. In Australia, the Barred variant is split into two separate colors, Dark Barred and Light Barred. The difference between these colors is highly noticeable, with the bars of white color wider and the grey lighter in the Light Barred than in Dark Barred.

Use

The Plymouth Rock was bred as a dual-purpose fowl, meaning that it was valued both for its meat and the egg-laying ability of the hens. It is a cold-hardy bird. The hens lay brown eggs, and continue laying all through the winter with decreased production.