jueves, 5 de marzo de 2009

Animated fairies at dragondropland.comGif Letras, Numeros y Simbolos en RombosAnimated fairies at dragondropland.com

Datum plane: An artificially established, well surveyed horizontal plane against which elevations, depths, tides, etc. are measured (for example mean sea-level).

http://farm4.static.flickr.com/3163/2678638123_f1a4b49e29.jpg

Daughter element: Also "daughter product". An element that occurs in a rock as end product of the radioactive decay of another element.

http://www.istockanalyst.com/images/articles/HAI_01132009_Fig1.jpg2009148352.jpg

Debris avalanche: A fast downhill mass movement of soil and rock.

http://www.conservation.ca.gov/cgs/information/publications/cgs_notes/note_33/PublishingImages/33-debav.gif

Declination: At any place on Earth, the angle between the magnetic and rotational poles.


http://astronomy.swinburne.edu.au/cms/imagedb/albums/userpics/declination1.gif

Deflation: The removal of clay and dust from dry soil by strong winds.

http://www.fhsu.edu/biology/Eberle/PacificNW/DeflationPlainME99.JPG

Delta: A body of sediment deposited in an ocean or lake at the mouth of a stream.

http://www.vegueries.com/reportatges/deltaFmap.gif

Delta kame: A deposit having the form of a steep, flat topped hill, left at the front of a retreating continental glacier.

http://www.earth.rochester.edu/ees274/EBNApage/kamedelta2.gif

Dendritic drainage: A stream system that branches irregularly and resembles a branching tree in plan.

http://www.tulane.edu/%7Esanelson/images/drainpat.gif

Density: The mass per unit volume of a substance, commonly expressed in grams/ cubic centimeter.

http://static.howstuffworks.com/gif/science-projects-for-kids-density-and-volume-2.jpg



Density current: A subaqueous current that flows on the bottom of a sea or lake because entering water is denser due to temperature or suspended sediments.

http://www.cst.com/CMS/images/article205/fields.jpg


Deposition: A general term for the accumulation of sediments by either physical or chemical sedimentation.

http://www.pacificislandtravel.com/nature_gallery/geomorpohology3.gif


Desert pavement: A residual deposit produced by continued deflation, which removes the fine grains of a soil and leaves a surface covered with closely packed cobbles.

http://www2.mcdaniel.edu/Biology/wildamerica/desert/DesertPavement.jpg

Detrital sediment: A sediment deposited by a physical process.

http://spot.pcc.edu/%7Eksutton/GEO207/Images/witwatersrand_conglomerate.jpg

Diagenesis: The physical and chemical changes undergone by a sediment during lithification and compaction, excluding erosion and metamorphism.


http://www.cnsm.csulb.edu/departments/geology/images/monterey.jpg

Diatom: A one celled plant that has a siliceous framework and grows in oceans and lakes.

http://www.micrographia.com/specbiol/alg/diato/diat0200/diatom05.jpg


Diatomite: A siliceous chert-like sediment formed from the hard parts of diatoms.

http://www.mine-engineer.com/mining/mineral/Diatomite-small.jpg

Diatom ooze: A fine muddy sediment consisting of the hard parts of diatoms.

http://www-odp.tamu.edu/publications/202_IR/chap_12/images/12_f21.jpg


Diatreme: A volcanic vent filled with breccia by the explosive escape of gases.

http://www.eos.ubc.ca/research/diamonds/kopylova/pics/Maar_xsect1.gif

DICTIONARY:It is a reference book.You can be found: meaning of words, translation, synonyms, tenses, grammatical information, pronunciation, abbreviations, examples, images, derivations and grossed reference.

A book giving information on particular subjects or on a particular class of words, names, or facts, usually arranged alphabetically: a biographical dictionary; a dictionary of mathematics.

differential: is a device, usually but not necessarily employing gears, capable of transmitting torque and rotation through three shafts, almost always used in one of two ways. In one way, it receives one input and provides two outputs; this is found in most automobiles. In the other way, it combines two inputs to create an output that is the sum, difference, or average, of the inputs.

http://stockcarscience.com/blog/media/blogs/scs/differential.gif

Dip: The angle by which a stratum or other planar feature deviates from the horizontal. The angle is measured in a plane perpendicular to the strike.

http://www.uwm.edu/Course/geosci697/stereo/dip-angle%20direction.jpg

Divide: A ridge of high ground separating two drainage basins emptied by different streams.


http://www.noaanews.noaa.gov/stories2006/images/southern-ocean-divide.jpg


Dome: In structural geology, a round or elliptical upwarp of strata resembling a short anticline.

http://media-2.web.britannica.com/eb-media/07/125907-004-8EB5F2E2.jpg

Drainage basin: A region of land surrounded by divides and crossed by streams that eventually converge to one river or lake.

http://www.uwsp.edu/geO/faculty/ritter/images/lithosphere/fluvial/drainage_basin.jpg

Drift (glacial): A collective term for all the rock, sand, and clay that is transported and deposited by a glacier either as till or as outwash.

http://pubs.usgs.gov/dds/dds-39/images/JPG/large_screen/fig51.jpg

Drumlin: A smooth, streamlined hill composed of till.

http://www.fettes.com/lothian/images/drumlin.jpg

Dry wash: An intermittent streambed in an arroyo or canyon that carries water only briefly after a rain.

http://pubs.usgs.gov/of/2008/1100/images/coverphoto.jpg

Dune: An elongated mound of sand formed by wind or water.

http://chgblog.com/images/dune.jpg

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