normal polarity

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• Polarity chron — A Polarity Chron, or chron, is a term used in stratigraphy (a branch of geology) to name the time interval represented by a magnetostratigraphic polarity unit. It represents a certain time period in geologic history where the Earth s magnetic… …   Wikipedia

• Algebraic normal form — In Boolean logic, the algebraic normal form (ANF) is a method of standardizing and normalizing logical formulas. As a normal form, it can be used in automated theorem proving (ATP), but is more commonly used in the design of cryptographic random… …   Wikipedia

• magnetic polarity — GLOSSARY OF VOLCANIC TERMS The direction of the magnetic poles (either normal or reversed) that is preserved in igneous rocks after they cool below their Curie temperature (USGS Glossary of Volcano and Related Terminology) …   Glossary of volcanic terms

• Geomagnetic reversal — Magnetic reversal redirects here. For switching of a magnet, see Magnetization reversal. Geomagnetic polarity during the late Cenozoic Era. Dark areas denote periods where the polarity matches today s polarity, light areas denote periods where… …   Wikipedia

• Magnetostratigraphy — is a geophysical correlation technique used to date sedimentary and volcanic sequences. The method works by collecting oriented samples at measured intervals throughout the section. The samples are analyzed to determine their characteristic… …   Wikipedia

• Plate tectonics — The tectonic plates of the world were mapped in the second half of the 20th century …   Wikipedia

• Central Atlantic Magmatic Province — The Central Atlantic magmatic province (CAMP) was formed during the breakup of Pangaea during the Mesozoic Era. The initial breakup of Pangaea in early Jurassic time provided a legacy of basaltic dikes, sills, and lavas over a vast area around… …   Wikipedia

• Motonori Matuyama — (松山 基範, Matsuyama Motonori?, October 25, 1884 – January 27, 1958) was a Japanese geophysicist who was the first to surmise that the Earth s magnetic field had undergone reversals in the past. The era of reversed polarity preceding the current… …   Wikipedia

• Anaplasia — Hyperplasia, Hypertrophy, Carcinoma, SarcomaHyperplasia: an increase in the number of cells in an organ or tissue, which usually leads to an increase in the size of the tissue or organHypertrophy: an increase in the size of cells, leading to an… …   Wikipedia

• Columbia River Basalt Group — The Columbia River Basalt Group (including the Steen and Picture Gorge basalts) extends over portions of five states. The Columbia River Basalt Group is a large igneous province that lies across parts of the Western United States . It is found in …   Wikipedia

• Balanced audio — is a method of interconnecting audio equipment using impedance balanced lines. This type of connection is very important in sound recording and production because it allows for the use of long cables while reducing susceptibility to external… …   Wikipedia