period

Home > ... > Earth and the Environment > Geology and Oceanography > Geology and Oceanography > ...

Essential reading Compare
side-by-side A Dictionary of Computing The Columbia Encyclopedia, Sixth Edition

period

period unit of time on the geologic timescale . Periods are shorter than an era and longer than an epoch. Periods are of variable length, generally lasting tens of millions of years, with characteristic fossils found preserved in the sediments deposited during the period. It is also used to designate a characteristic of geologic time, such as the glacial period.

Create a link to this page

Copy and paste this link tag into your Web page or blog:

<a href="http://www.encyclopedia.com/topic/.aspx#1E1-period3" title="Facts and information about period">period</a>

Give this article a thumbs-up on StumbleUpon

Cite this article
Pick a style below, and copy the text for your bibliography.

MLA
Chicago
APA

"period." The Columbia Encyclopedia, Sixth Edition. 2008. Encyclopedia.com. 5 Dec. 2009 <http://www.encyclopedia.com>.

"period." The Columbia Encyclopedia, Sixth Edition. 2008. Encyclopedia.com. (December 5, 2009). http://www.encyclopedia.com/doc/1E1-period3.html

"period." The Columbia Encyclopedia, Sixth Edition. 2008. Retrieved December 05, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-period3.html

Learn more about citation styles

period

A Dictionary of Computing | 2004 | | Â© A Dictionary of Computing 2004, originally published by Oxford University Press 2004. (Hide copyright information) Copyright

period The time required for a periodic waveform – i.e. a waveform recurring at fixed intervals – to repeat itself.

Create a link to this page

Copy and paste this link tag into your Web page or blog:

<a href="http://www.encyclopedia.com/topic/.aspx#1O11-period" title="Facts and information about period">period</a>

Cite this article
Pick a style below, and copy the text for your bibliography.

MLA
Chicago
APA

JOHN DAINTITH. "period." A Dictionary of Computing. 2004. Encyclopedia.com. 5 Dec. 2009 <http://www.encyclopedia.com>.

JOHN DAINTITH. "period." A Dictionary of Computing. 2004. Encyclopedia.com. (December 5, 2009). http://www.encyclopedia.com/doc/1O11-period.html

JOHN DAINTITH. "period." A Dictionary of Computing. 2004. Retrieved December 05, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O11-period.html

Learn more about citation styles

Related entries from encyclopedias, dictionaries and thesauruses

Rate these entries|See all related entries

Free newspaper and magazine articles

	Primedex Health Systems Reports First Six Months Profit. Business Wire; 6/14/2001
	CanArgo Announces Convertible Bond Issue. Business Wire; 6/14/2001
	Bigmar Announces Approval. Business Wire; 6/14/2001

Facts and information from other sites

Related articles from newspapers, magazines, and more

	Exhibit features key era at SJSU Newspaper article from: Oakland Tribune; 1/13/2007; ; 700+ words ; SAN JOSE -- Their faces are older, their step is slower, but their contributions toward shaping a historic period in civil rights have grown stronger with time. They are San Jose State alumni, African Americans 40 years past their athletic...
	OBITUARIES Newspaper article from: The Washington Post; 1/19/1999; 700+ words ; ...and attended what then was Salisbury Normal School. In the 1930s, she came to Washington and was a schoolteacher for a brief period. She was vice president general of the national unit of Daughters of the American Revolution and was honorary state regent...
	Panthers rally to win by one Newspaper article from: Oakland Tribune; 1/13/2007; ; 700+ words ; ...lead when Fochtman hit one of two free throws with 1:00 left in the third quarter. But Burlingame hit two baskets to end the period and used a strong defense to pressure the Vikings into five turnovers before they could score another point, more than three...
	Monte Vista's 17th win doesn't come easily Newspaper article from: Oakland Tribune; 1/13/2007; ; 642 words ; ...relinquish in a 57-50 victory. "This was the first time this year we've been in the situation where we are trailing for a long period of time," said Monte Vista sophomore Niveen Rasheed. "It was something new for us and definitely a learning experience...
	Economy Continued On a Roll In 1998; Consumer Prices Rose Just 1.6% Newspaper article from: The Washington Post; 1/15/1999; ; 700+ words ; ...from 1997. Sales of automobiles and housing materials were major contributors to the increase. "It is really a remarkable period that we are in right now," said Bill Cheney, chief economist for John Hancock Mutual Life Insurance Co. in Boston. "This...
	An Illness No One Understands: Tourette's Syndrome. Newspaper article from: The Washington Post; 1/19/1999; ; 700+ words ; ...of that illness are not always readily noticeable; like many Tourette's patients, Aaron can suppress his tics for brief periods, in somewhat the same way people can temporarily suspend breathing--and with about as much chance of long- term success...
	Pair of power-play goals lifts Devils past Thrashers Newspaper article from: Deseret News (Salt Lake City); 1/13/2007; ; 452 words ; ...Brylin scored power-play goals 28 seconds apart in the third period to lead the New Jersey Devils to a 2-1 win over the Atlanta...fifth straight loss. Atlanta held the lead entering the third period in each of the last four defeats. The Devils made the most...
	Brentsville Takes Over From Start; Tigers' Big Lead Yields State Title Newspaper article from: The Washington Post; 3/10/1999; ; 700+ words ; ...younger Jenkins defeated John Battle's Rickey Harless, 3-2, with a takedown on the edge of the mat midway through the third period. The referee did not signal the call at first, but the assistant referee who had better position overruled him. The John...
	CALENDAR Newspaper article from: The Washington Post; 3/10/1999; 700+ words ; ...It looks at the lives and heritage of the people. Most of the objects on display through June 6 are from the Classic Maya period from about 400 to 900 A.D., and they depict everything from ancient mariners, warriors and kings to modern-day Mayan...
	Wild022 -- 4Oilers020 -- 2 ... Newspaper article from: The Washington Post; 1/13/2007; 323 words ; ...Wild end an 11-game road losing streak on Thursday. SECOND PERIOD Scoring: 1, Edmonton, Horcoff 7 (Smyth, Smith), :20...4, Edmonton, Sykora 17 (Nedved, Smid), 17:47. THIRD PERIOD Scoring: 5, Minnesota, Carney 2 (Radivojevic, Walz...