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Result search of : P
Title Description
 Pyroclastic   

A. Being or pertaining to rock fragments formed in a volcanic eruptio
B.Produced by explosive or aerial ejection of ash, fragments, and glassy material from a volcanic vent. Applied to the rocks and rock layers as well as to the textures so formed.

 
 Paleogeologic Map   

A map that shows the areal geology of an ancient surface at some time in the geologic past; esp. such a map of the surface immediately below an unconformity, showing the geology as it existed at the time the surface of unconformity was completed but before the overlapping strata were deposited. Paleogeologic maps were introduced by Levorsen (1933).
 
 Poly   

A prefix signifying many. Used in many mineral names, such as polybasite, polycrase, polyhalite, and polyaugite.

 
 Pyroxmangite   

A triclinic mineral, MnSiO3 ; forms a series with pyroxferroite where iron replaces manganese; forms brown cleavable masses near Iva, SC; Homedale, ID; Sweden; and Scotland.
 
 Paleo   

A. A combining form denoting great age or remoteness in regard to time (Paleozoic), or involving ancient conditions (paleoclimate). Sometimes given as pale- (palevent). B. A prefix indicating pre-Tertiary origin, and generally altered character, of a rock to the name of which it is added, such as paleopicrite; by some the prefix has been applied to pre-Carboniferous rocks or features, such as the PaleoAtlantic Ocean.

 
 Paleogeography   

A. The study and description of the physical geography of the geologic past, such as the historical reconstruction of the pattern of the Earth’s surface or of a given area at a particular time in the geologic past, or the study of the successive changes of surface relief during geologic time.
B. The study of the relative positions of land masses as part of tectonic reconstructions of Earth history.
 
 Pyrrhotite   

A.A mineral, iron sulfide. So commonly associated with nickel minerals that has been called "world’s greatest nickel ore."
B.A monoclinic and hexagonal mineral, FeS ; invariably deficient in iron; variably ferrimagnetic; metallic; bronze yellow with iridescent tarnish; in mafic igneous rocks, contact metamorphic deposits, high-temperature veins, and granite pegmatites. Where associated with pentlandite and nickel replaces iron, it is a source of nickel. Also spelled pyrrhotine. Syn: magnetic pyrite; dipyrite.

 
 Pacific Suite   

One of two large groups of igneous rocks, characterized by calcic and calc-alkalic rocks. Harker (1909) divided all Tertiary and Holocene igneous rocks of the world into two main groups, the Atlantic suite and the Pacific suite. Because there is such a wide variation in tectonic environments and associated rock types in the areas of Harker’s Atlantic and Pacific suites, the terms are now seldom used to indicate kindred rock types.

 
 Paleontologist   

Person who studies the fossilized remains of animals and/or plants
 
 Paragenesis   
A characteristic association or occurrence of minerals or mineral assemblages in ore deposits, connoting contemporaneous formation.

 
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