jueves, 5 de marzo de 2009

Gif Letras, Numeros y Simbolos en Rombos

Pahoehoe: A basaltic lava flow with a glassy, smooth, and undulating, or ropy, surface.

http://library.thinkquest.org/J001393/volcanoes/images/pahoehoe.jpg

Paleoclimate: The average state or typical conditions of climate during some past geologic period.

http://www.johnstonsarchive.net/spaceart/earthicemap.jpg

Paleomagnetism: The science of the reconstruction of the Earth's ancient magnetic field and the positions of the continents from the evidence of remnant magnetization in ancient rocks.

http://stloe.most.go.th/volcano/lo401/images/Eng/4_2.jpg

Paleontology: The science of fossils, of ancient life-forms, and their evolution.

http://www.paleoportal.org/kiosk/sample_site/images/nautilus_home.jpg

Paleowind: A prevailing wind direction in an area, inferred from dune structure or the distribution of volcanic ash for one particular time in geologic history.

http://www.aapg.org/explorer/2008/11nov/conjugate1.jpg

Pangaea: According to some theories, a great proto-continent from which all present continents have broken off by the mechanism of sea-floor spreading and continental drift..

http://bprc.osu.edu/education/rr/plate_tectonics/pangea_diagram.jpg

Panthalassa: A hypothetical primeval ocean covering two-thirds of the world except for the continent of Pangaea.

http://www.estrellamountain.edu/faculty/farabee/biobk/aPerm.jpg


Peat: A marsh or swamp deposit of water-soaked plant remains containing more than 50 percent carbon.

http://www.wsgs.uwyo.edu/coalweb/images/peat4.jpg

Pedalfer: A common soil type in humid regions, characterized by an abundance of iron oxides and clay minerals deposited in the B-horizon by leaching.

http://www.gly.fsu.edu/%7Esalters/GLY1000/10Weathering_Erosion/Slide32.jpg

Pediment: A planar, sloping rock surface forming a ramp up to the front of a mountain range in an arid region. It may be covered locally by thin alluvium.

http://www.geocities.com/scott_cotter/pediment1.jpg

Pedocal: A common soil type of arid regions, characterized by accumulation of calcium carbonate in the A-horizon.

http://hays.outcrop.org/images/weathering/press4e/figure-07-16-5.jpg

Pegmatite: An igneous rock with extremely large grains, more than a centimeter in diameter. It may be of any composition but most frequently is granitic.

http://www.gc.maricopa.edu/earthsci/imagearchive/PEGMATITE_big.jpg

Perched groundwater: An isolated body of ground-water that is perched above and separated from the main water table by an aquiclude.

http://www.co.portage.wi.us/Groundwater/undrstnd/Images/perch2.jpg

Peridotite: A coarse-grained mafic igneous rock composed of olivine with accessory amounts of pyroxene and amphibole but little or no feldspar.

http://geology.com/rocks/pictures/peridotite.jpg

Potable water: Water that is agreeable to the taste and not dangerous to the health.

http://www.akvadon.ru/images/PicDrink.jpg

Pothole: A semispherical hole in the bedrock of a stream bed, formed by abrasion of small pebbles and cobbles in a strong current.

http://media.torontolife.com/dynimages/pothole.jpg

Pratt isostatic compensation: The mechanism in which variations in crustal density act to counterbalance the varying weight of topographic features. The crust is here assumed to be of approximately uniform thickness, thus a mountain range would be underlain by lihttp://content.answers.com/main/content/img/McGrawHill/Encyclopedia/images/CE356500FG0010.gifghter rocks.

PREPOSITION:it es a word used before nouns, pronouns, or other substantives to form phrases functioning as modifiers of verbs, nouns, or adjectives, and that typically express a spatial, temporal, or other relationship, as in, on, by, to, since.

PROCESS (engineering): refers to engineering which is collaborative and concerned with completing a project as a whole.


PRONOUN:The part of speech that substitutes for nouns or noun phrases and designates persons or things asked for, previously specified, or understood from the context.


Proto-sun: A large cloud of dust and gas gradually coalescing into a star under the force of gravity.

http://physicalsciences.ucsd.edu/news/releases/2005/SolarNebula_lg.jpg

Proven reserves: Deposits of fossil fuels whose location and extent are known, as opposed to potential but unproved ('*discovered") deposits.

pulley is a mechanism composed of a wheel with a groove between two flanges around the wheel's circumference. A rope cable or belt usually runs inside the groove. Pulleys are used to change the direction of an applied force, transmit rotational motion, or realize a mechanical advantage in either a linear or rotational system of motion.

http://etc.usf.edu/clipart/25700/25757/fixed_pulley_25757_lg.gif


Pumice: A form of volcanic glass, usually of silicic composition, so filled with vesicles that it resembles a sponge and is very light.

http://www.swisseduc.ch/stromboli/glossary/icons/pumice_2.jpg


Pyroclastic rock: A rock formed by the accumulation of fragments of volcanic rock scattered by volcanic explosions.

http://www.es.ucl.ac.uk/schools/Glossary/tuff.jpg

Pyroxene granulite: A coarse-grained contact metamorphic rock containing pyroxene, formed at high temperatures and low pressures.

http://www.nhm.ac.uk/resources-rx/images/beacon-sandstone-with-sun-cracks-20321-1.jpg

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