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chron

chron
1. A small unit of geologic time, equivalent to the chronostratigraphic unit chronozone, usually based on fossil zonation (see BIOCHRON). When used formally (e.g. Gilbert Chron) the initial letter is capitalized.

2. A single time interval of constant polarity of the geomagnetic field (polarity chron).

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"chron." A Dictionary of Earth Sciences. . Encyclopedia.com. 20 Oct. 2017 <http://www.encyclopedia.com>.

"chron." A Dictionary of Earth Sciences. . Encyclopedia.com. (October 20, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/chron

"chron." A Dictionary of Earth Sciences. . Retrieved October 20, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/chron

chron

chron
1. A small unit of geologic time, equivalent to the chronostratigraphic unit chronozone, that is usually based on fossil zonation. When used formally (e.g. Gilbert Chron) the initial letter is capitalized.

2. (polarity chron) A single time interval of constant polarity of the geomagnetic field.

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"chron." A Dictionary of Ecology. . Encyclopedia.com. 20 Oct. 2017 <http://www.encyclopedia.com>.

"chron." A Dictionary of Ecology. . Encyclopedia.com. (October 20, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/chron-0

"chron." A Dictionary of Ecology. . Retrieved October 20, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/chron-0

chron

chron A subdivision of geological time based on the direction of magnetization, as preserved in rocks of the period. Within many chrons there are shorter periods of alternate magnetization (subchrons). The two most recent chrons in Earth history are the Matuyama (reversed) and Brunhes (normal).

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"chron." A Dictionary of Zoology. . Encyclopedia.com. 20 Oct. 2017 <http://www.encyclopedia.com>.

"chron." A Dictionary of Zoology. . Encyclopedia.com. (October 20, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/chron-1

"chron." A Dictionary of Zoology. . Retrieved October 20, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/chron-1