Petrology is a field of geology which focuses on the study of rocks and the conditions by which they form. There are three branches of petrology, corresponding to the three types of rocks: igneous, metamorphic, and sedimentary. The word petrology itself comes from the Greek word "petra", meaning rock.

• Igneous petrology focuses on the composition and texture of igneous rocks (rocks such as granite or basalt which have crystallized from molten rock or magma). Igneous rocks include volcanic and plutonic rocks.
• Sedimentary petrology focuses on the composition and texture of sedimentary rocks (rocks such as sandstone or limestone which consist of sedimentary particles bound together in a matrix of finer material).
• Metamorphic petrology focuses on the composition and texture of metamorphic rocks (rocks such as slate or marble which started out as sedimentary or igneous rocks but which have undergone chemical, mineralogical or textural changes due to extremes of pressure, temperature or both).

Petrology utilizes the classical fields of mineralogy, microscopic petrography, and chemical analyses to describe the composition and texture of rocks. Modern petrologists also include the principles of geochemistry and geophysics through the studies of geochemical trends and cycles and the use of thermodynamic data and experiments to better understand the origins of rocks.

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un bonito bosque http://www.rockeyecandy.com/petrology/mvb/MVB2.jpg en un lugar inimaginable.
OctavioRafael (Octavio Rafael) Wed, 16 Dec 2009 17:27:20 -0000
un bonito bosque http://www.rockeyecandy.com/petrology/mvb/MVB2.jpg en un lugar inimaginable.
Today back to nangor, meet people, face the exam of petrology..
nisaipujiresya (nisa indah pujiresya) Sun, 13 Dec 2009 22:42:41 -0000
Today back to nangor, meet people, face the exam of petrology..
today's goal: finish petrology take home exam and get a good chunk of reading done for my research paper...
rocksnstilettos (shh... :)) Fri, 11 Dec 2009 15:13:27 -0000
today's goal: finish petrology take home exam and get a good chunk of reading done for my research paper...
Due dates: Petrology and Geochemistry: Full Proposal Window: January 6, 2010Program Guidelines: NSF 09-543 ... http://bit.ly/6wFbqk
NSF_ERE (NSF Env Rsch & E) Thu, 10 Dec 2009 06:27:00 -0000
Due dates: Petrology and Geochemistry: Full Proposal Window: January 6, 2010Program Guidelines: NSF 09-543 ... http://bit.ly/6wFbqk

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