1. Porphyry (geology) - Wikipedia, The Free Encyclopedia porphyry is a variety of igneous rock consisting of largegrained crystals, such as feldspar or quartz, dispersed in a fine-grained feldspathic matrix or http://en.wikipedia.org/wiki/Porphyry_(geology)

Porphyry (geology) From Wikipedia, the free encyclopedia Jump to: navigation search A piece of porphyry Porphyry is a variety of igneous rock consisting of large-grained crystals , such as feldspar or quartz , dispersed in a fine-grained feldspathic matrix or groundmass. The larger crystals are called phenocrysts . In its non-geologic, traditional use, the term "porphyry" refers to the purple-red form of this stone, valued for its appearance. The term "porphyry" is from Greek and means " purple ". Purple was the color of royalty, and the "Imperial Porphyry" was a deep brownish purple igneous rock with large crystals of plagioclase . This rock was prized for various monuments and building projects in Imperial Rome and later. Pliny's Natural History affirmed that the "Imperial Porphyry" had been discovered at an isolated site in Egypt in AD 18, by a Roman legionnaire named Caius Cominius Leugas (Werner 1998). It came from a single quarry in the Eastern Desert of Egypt , from 600 million year old andesite of the Arabian-Nubian Shield . The road from the quarry westward to Qena (Roman Maximianopolis) on the Nile, which Ptolemy put on his second-century map, was described first by

2. Porphyry (Stanford Encyclopedia Of Philosophy) porphyry (234?–305? C.E.) was a Neoplatonist philosopher born in Tyre in Phoenicia. He studied with Longinus in Athens and then with Plotinus in Rome from http://plato.stanford.edu/entries/porphyry/

Cite this entry Search the SEP Advanced Search Tools ... Please Read How You Can Help Keep the Encyclopedia Free Porphyry First published Fri 18 Feb, 2005 1. Life 2. Works and Profile 3. Philosophical Views 3.1 Religion ... Related Entries 1. Life The Life of Plotinus . Before he came to study with Plotinus in Rome in 263 C.E. he studied with the Middle Platonist Longinus in Athens. In Rome he stayed for some five years and converted to Plotinus' version of Platonism. On Plotinus' advice he left Rome for Sicily in order to recover from a bout of depression in 268 C.E. He must have stayed there for some time, even beyond Plotinus' death in 270 C.E. There are some untrustworthy reports about a school of Porphyry in Rome after Plotinus' death. In reality we do not know anything with certainty about where he lived in the latter half of his life. He may have been Iamblichus' teacher. The evidence for this, however, is not beyond dispute. It is clear, though, that Iamblichus was strongly influenced by Porphyry, even if he turned vehemently against him. Towards the end of his life (301 C.E.), Porphyry edited Plotinus' writings, the Enneads , dividing them into six books of nine treatises each, which he prefaced with his Life of Plotinus . The latter is the most reliable and the most informative source about his life and attitudes. He married fairly late an older wife, for whom one of his extant writings, the

3. Porphyry porphyry is a widely varying type of igneous rock. http://geology.about.com/library/bl/images/blporphyry.htm

zOBT=" Ads" zGCID=" test1" zGCID+=" test15" zJs=10 zJs=11 zJs=12 zJs=13 zc(5,'jsc',zJs,9999999,'') z160=zpreC(160,600);z336=zpreC(336,280);z728=zpreC(728,90);z133=zpreC(336,133);zItw=160 Search over 1.4 million articles by over 600 experts Search Geology var h2=document.getElementsByTagName("h2")[0];if(h2.getElementsByTagName("a")[0].firstChild.nodeValue.length>29)h2.className="long"; Home Education Geology Email ... Explore Geology See More About: igneous rocks Porphyry Newfoundland Geological Survey ( fair use policy alkali feldspar . Geologists also may call this a rhyolite with porphyritic texture. That is, "porphyry" refers to a texture, not a composition, just as "satin" refers to a type of fabric rather than the fiber it's made from. See other examples of porphyritic texture in andesite basalt and in the extrusive volcanic rocks gallery Fossils Geologic Features and Processes Glaciers and Ice ... Geology and Society Subscribe to the Newsletter Name Email Related Articles Geologic Gift Ideas Art History Glossary - T - texture About Igneous Rocks Wacke or Graywacke ... Drawing Winter Scenes Guide since 1997 Andrew Alden Geology Guide Sign up for My Newsletter My Blog My Forum zSB(2,5);

4. Porphyry porphyry (c.232/4c.305) or Porphyrios was born in Tyre now Lebanon or Batanaea now Syria, and studied in Athens, before joining the Neoplatonic group http://www.kheper.net/topics/Neoplatonism/Porphyry.htm

Home Topics Khepershop Guestbook ... Links Porphyry image from Porphyry Malchus MacTutor History of Mathematics archive Porphyry (c.232/4-c.305) or Porphyrios was born in Tyre [now Lebanon] or Batanaea [now Syria], and studied in Athens, before joining the Neoplatonic group of Plotinus in Rome. In 263-268 or thereabouts, Porphyry studied philosophy in Rome under Plotinus, who rescued him from a suicidal depression In 301 Porphyry completed The Enneads , a systematized and edited collection of the works of Plotinus, including a short but very informative biography. The name Enneads means "Nines", so-called because they were sorted into chapters of nine sections each. (This arrangement of course was purely Porphyry's idea). The Enneads became a book of great significance and influence, not only in the Hellenistic-Roman world, but later in the Islamic and Renaissance Christian worlds as well. Although not an original thinker in the league of his teacher Plotinus, or his student Iamblichus , Porphyry nevertheless was possessed of great learning, an interest in and great talent for historical and philological criticism, and an ernest desire to uproot false teachings in order to ennoble people and turn them to the Good. He declared the salvation of the soul as the ultimate purpose of philosophy. Even more than Plotinus, Porphyry emphasised the mystic path of "flight from the body" (although never in teh context of the Gnostics who considered the material world as "evil"). He also played down the emanationist hierarchies of the Middle Platonists and Plotinus, and seemed sometimes to combine One and Intellect, a process of "telescoping the

5. Porphyry --  Britannica Online Encyclopedia Britannica online encyclopedia article on porphyry Neoplatonist Greek philosopher, important both as an editor and as a biographer of the philosopher http://www.britannica.com/eb/article-9060889/Porphyry

var britAdCategory = "literature"; Already a member? LOGIN Encyclopædia Britannica - the Online Encyclopedia Home Blog Advocacy Board ... Free Trial Britannica Online Content Related to this Topic This Article's Table of Contents Porphyry Print this Table of Contents Linked Articles Plotinus Shopping New! Britannica Book of the Year The Ultimate Review of 2007. 2007 Britannica Encyclopedia Set (32-Volume Set) Revised, updated, and still unrivaled. New! Britannica 2008 Ultimate DVD/CD-ROM The world's premier software reference source. Porphyry Page 1 of 1 born c. 234, Tyre [modern Sur, Lebanon] or Batanaea [in modern Syria] died c. 305, Rome? original name Malchus Neoplatonist Greek philosopher, important both as an editor and as a biographer of the philosopher Plotinus and for his commentary on Aristotle's Categories , which set the stage for medieval developments of logic and the problem of universals. Boethius' Latin translation of the introduction ( Isagoge Porphyry... (75 of 230 words) To read the full article, activate your FREE Trial

6. Medieval Sourcebook: Porphyry: Against The Christians An excerpt from a porphyry tract against Christian irrationalism, as preserved by Eusebius. http://www.fordham.edu/halsall/source/porphyry1.html

Back to Medieval Source Book ORB Main Page Links to Other Medieval Sites Medieval Sourcebook: Porphyry: Against the Christians As Christianity spread, there was an increasingly intellectual reaction to it among the classically oriented intellectuals who sought to defend "reason". Here is Porphyry, a leading "Neoplatonist" attacking Christian unreason as reported by Eusebius. "Some persons, desiring to find a solution to the baseness of the Jewish Scriptures rather than abandon them, have had recourse to explanations inconsistent and incongruous with the words written, which explanations, instead of supplying a defense of the foreigners, contain rather approval and praise of themselves. For they boast that the plain words of Moses are "enigmas", and regard them as oracles full of hidden mysteries; and having bewildered the mental judgment by folly, they make their explanations." These things are said by Porphyry in the third book of his work against the Christians. from Eusebius: Church History , in Nicene and Post-Nicene Fathers, 2nd Series, ed. P. Schaff and H. Wace, (repr. Grand Rapids MI: Wm. B. Eerdmans, 1955), Vo1 I, pp. 265-266

7. Porphyry Collected fragments of this lost work by porphyry, as well as links to other resources. Drawn from various translations. http://www.cosmopolis.com/people/porphyry.html

Porphyry Philosopher (232/3- c . 305 C.E.) Local Resources Porphyry: Concerning Cult Images Provides an allegorical interpretation of the symbolism and names of the Greek divinities. Recommended Reading Porphyry's Letter to His Wife Marcella . Contains an introduction to the life and work of Porphyry by David Fideler. (Phanes Press) Porphyry's Launching-Points to the Realm of Mind: An Introduction to the Neoplatonic Philosophy of Plotinus . An appendix contains a listing of Porphyry's writings, including those which are lost nearly eighty titles in all. (Phanes Press) Porphyry: On the Cave of the Nymphs . An allegorical interpretation of the cave in the thirteenth book of the Odyssey as an image of the cosmos. (Phanes Press) PHILOSOPHY AND COSMOLOGICAL STUDIES PEOPLE TOPICS ALEXANDRIA ON THE WEB

8. Welcom To Porphyry USA, Inc. Home Page porphyry USA, Inc. 5272 River Road, Suite 365 Bethesda, MD 20816 Phone 301 656 7735 Welcome To porphyry USA, Inc. Click on a stone for further details. http://www.porphyryusa.com/

Porphyry USA, Inc. 5272 River Road, Suite 365 Bethesda, MD 20816 Phone: 301 656 7735 Fax: 301 656 7740 pavers@porphyryusa.com Click on a stone for further details. Web Designs By Techknow Works. If you experience any difficulties using this site, please contact the webmaster

9. The Internet Classics Archive | Works By Porphyry List of works by porphyry, part of the Internet Classics Archive. http://classics.mit.edu/Browse/browse-Porphyry.html

Home Search Buy Books and CD-ROMs ... Help Works by Porphyry On Images Translated by Edwin Hamilton Gifford Read discussion : 2 comments

10. Porphyry - Definition From The Merriam-Webster Online Dictionary Definition of porphyry from the MerriamWebster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. http://www.merriam-webster.com/dictionary/porphyry

Home Visit Our Sites Unabridged Dictionary Learner's Dictionary ... Contact Us Also Visit: Unabridged Encyclopedia Britannica Visual ESL: Learner's for Kids: Spell It! Word Central Dictionary Thesaurus Spanish/English Medical Search "porphyry" in: Thesaurus Spanish/English Medical Dictionary Open Dictionary Browse words next to: porphyry Browse the Dictionary: A B C D ... Z porphyry One entry found. porphyry Main Entry: Pronunciation: p Function: noun Inflected Form(s): plural Etymology: Middle English porphiri, from Medieval Latin porphyrium, alteration of Latin porphyrites, from Greek lithos ), literally, stone like Tyrian purple, from porphyra purple Date: 15th century  a rock consisting of feldspar crystals embedded in a compact dark red or purple groundmass  an igneous rock of porphyritic texture Learn more about "porphyry" and related topics at Britannica.com Find Jobs in Your City Pronunciation Symbols Products ... Advertising Info

11. Porphyry Summary A concise biography with references, and links to related thinkers. http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Porphyry.html

Porphyry Malchus Click the picture above to see a larger version Porphyry Malchus wrote a commentary on Euclid's Elements and a Life of Pythagoras Full MacTutor biography [Version for printing] List of References (9 books/articles) Mathematicians born in the same country Other Web sites Encyclopaedia Britannica Previous (Chronologically) Next Main Index Previous (Alphabetically) Next Biographies index JOC/EFR © April 1999 The URL of this page is: http://www-history.mcs.st-andrews.ac.uk/Mathematicians/Porphyry.html

12. Neoplatonism [Internet Encyclopedia Of Philosophy] The revival of Greek philosophy in 3rd century BCE, led by Plotinus and his disciple, porphyry. Influenced by both Pythagoras and Plato. http://www.iep.utm.edu/n/neoplato.htm

Neoplatonism Neoplatonism is a modern term used to designate the period of Platonic philosophy beginning with the work of Plotinus and ending with the closing of the Platonic Academy by the Emperor Justinian in 529 CE. This brand of Platonism, which is often described as 'mystical' or religious in nature, developed outside the mainstream of Academic Platonism. The origins of Neoplatonism can be traced back to the era of Hellenistic syncretism which spawned such movements and schools of thought as Gnosticism and the Hermetic tradition. A major factor in this syncretism, and one which had an immense influence on the development of Platonic thought, was the introduction of the Jewish Scriptures into Greek intellectual circles via the translation known as the Septuagint . The encounter between the creation narrative of Genesis and the cosmology of Plato's Timaeus set in motion a long tradition of cosmological theorizing that finally culminated in the grand schema of Plotinus' Enneads . Plotinus' two major successors, Porphyry and Iamblichus, each developed, in their own way, certain isolated aspects of Plotinus' thought, but neither of them developed a rigorous philosophy to match that of their master. It was Proclus who, shortly before the closing of the Academy, bequeathed a systematic Platonic philosophy upon the world that in certain ways approached the sophistication of Plotinus. Finally, in the work of the so-called Pseudo-Dionysius, we find a grand synthesis of Platonic philosophy and Christian theology that was to exercise an immense influence on mediaeval mysticism and Renaissance Humanism.

13. Porphyry's People - A Christchurch, New Zealand, Group Promoting Veganism And Th The web page of porphyry s People, a vegan group based in Christchurch, New Zealand, promoting veganism to further ethical, health and ecological goals. http://www.vegan.org.nz/

PORPHYRY'S PEOPLE A vegan group based in Christchurch, New Zealand, promoting veganism to further ethical, health and ecological goals. Editor: John Livesey PhD My way of joking is to tell the truth. It is the funniest joke in the world. George Bernard Shaw Vegan Monthly Healthy Eating Pyramid Nuts Soy ... Vegan Monthly Regularly updated links to recent original medical, scientific and philosophical advances in knowledge that support the vegan lifestyle or encourage a reduction in the use of animal products. The Healthy Eating Pyramid A Healthy Eating Pyramid based on recent research in nutritional epidemiology illustrates how closely scientific nutrition is approaching veganism. Nuts One of the most unexpected nutritional discoveries of the 1990s was that the frequent eating of nuts dramatically improves health. Optimal diet A presentation on the optimal diet for health and longevity. Soy The soy controversy: the hopes probably outweigh the fears. Obesity Veganism: a weapon to fight the obesity epidemic? Porphyry His life and work.

14. Ancient Greek Online Library | Porphyry porphyry. Biography and plays by this great author. http://www.greektexts.com/library/Porphyry/index.html

Ancient Drama - Tragedy Ancient Drama - Comedy Historiography Philosophy ... Other Authors Aeschines Aeschylus Aesop Alcidamas Aristophanes Aristotle Demosthenes Epictetus Epicurus Euripides Galen Herodotus Hippocrates Homer Lucretius Plato Plutarch Porphyry Quintus Sophocles Thucydides Texts Texts Aeschines Against Timarchus Aeschylus Agamemnon Eumenides Prometheus bound The Choephori The Persians The seven against thebes The Suppliants Aesop Aesop's Fables Alcidamas On the Sophists Aristophanes Acharnians Lysistrata Peace Plutus The Birds The Clouds The Ecclesiazusae The Frogs The Knights The Thesmophoriazusae The Wasps Aristotle Categories History of Animals Metaphysics Meteorology Nicomachean Ethics On Dreams On Generation and corruption On Interpratation On Longevity And Shortness Of Life On Memory And Reminiscense On Prophesying By Dreams On Sense And The Sensible On Sleep And Sleeplessness On Sophistical Refutations On The Gait Of Animals On The Generation Of Animals On The Heavens On The Motion Of Animals On The Parts Of Animals On The Soul On Youth And Old Age, On Life And Death, On Breathing Physics Poetics Politics Posterior Analytics Prior Analytics - Book I Prior Analytics - Book II Rhetoric The Athenian Constitution Topics Demosthenes For The Freedon Of The Rhodians For The Megapolitans On The Chersonese On The Crown On The Naval Boards On The Peace The First Olynthiac The First Philippic The Fourth Philippic The Second Olynthiac The Second Philippic The Third Olynthiac The Third Philippic Epictetus Discourses - Book I Discourses - Book II Discourses - Book III Discourses - Book IV

15. TAPE 2: BOETHIUS ON PORPHYRY In this lecture I will talk about Boethius other writings, and then I will comment on an extract from his commentary on porphyry. To follow this lecture http://www.humanities.mq.edu.au/Ockham/x52t02.html

Macquarie University PHIL252 Medieval Philosophy TAPE 2: BOETHIUS ON PORPHYRY R.J. Kilcullen Before listening to this tape you should read V.E. Watt's introduction to his Penguin translation of The Consolation of Philosophy . In this lecture I will talk about Boethius' other writings, and then I will comment on an extract from his commentary on Porphyry. To follow this lecture you will need either the Readings book, or Richard McKeon (ed.), Selections from Medieval Philosophers (New York: Charles Scribner's Sons). From the introduction by Watts you will have gathered that Boethius was both a philosopher and a politician. This combination of roles was recommended by Plato and exemplified (imperfectly) in Roman history by Cicero. Cicero also preceded Boethius as a translator of Greek philosophy into Latin. E.K. Rand in his chapter on Boethius in his Founders of the Middle Ages quotes from Boethius' preface to his commentary on Aristotle's Categories , written in the year Boethius was consul. He says: Although the cares of my consular office prevent me from devoting my entire attention to these studies, yet it seems to me a sort of public service to instruct my fellow citizens in the products of reasoned investigation... I am glad to assume the... task of educating our present society in the spirit of Greek philosophy... this is truly a part of my consular duty...

16. Porphyry, Introduction (or Isagoge) To The Logical Categories Of Aristotle (1853 Isagogue introduction to Aristotle s categories of logic. http://www.tertullian.org/fathers/porphyry_isagogue_02_translation.htm

Porphyry, Introduction (or Isagoge ) to the logical Categories of Aristotle (1853) vol. 2. pp.609-633. Chap. I. Object of the writer, in the present Introduction. Chap. II. Of the Nature of Genus and Species. ... Of Community and Difference of Property and Accident. [Translated by Octavius Freire Owen, M. A. of Christ Church, Oxford. Rector of Burstow, Surrey; and Domestic Chaplain to the Duke of Portland] INTRODUCTION OF PORPHYRY. Chap. I. Object of the writer, in the present Introduction. Since it is necessary, Chrysaorius, both to the doctrine of Aristotle's Categories, to know what genus, difference, species, property, and accident are, and also to the assignments of definitions, in short, since the investigation of these is useful for those things which belong to division and demonstration, I will endeavour by a summary briefly to discuss to you, as in the form of introduction, what on this subject has been delivered by the ancients, abstaining, indeed, from more profound questions, yet directing attention in a fitting manner, to such as are more simple. For instance, I shall omit to speak about genera and species, as to whether they subsist (in the nature of things) or in mere conceptions only; whether also if subsistent, they are bodies or incorporeal, and whether they are separate from, or in, sensibles

17. Untitled ANDESITE porphyry, Detail Another Specimen Return to Classification; pdf version. Typical Minerals. Minerals too small to identify (except phenocrysts, http://csmres.jmu.edu/geollab/fichter/IgnRx/AndPor-1A1.html

Ig. Home Simp.Class. Advanc.Class. Alpha.List ... Self Tests ANDESITE PORPHYRY Detail Another Specimen Return to Classification pdf version Typical Minerals Minerals too small to identify (except phenocrysts, which here are amphibole). Composition will be from middle of Bowen's Reaction series, and include such minerals as Ca/Na plagioclase, amphibole, and biotite. Description A fine grained (aphanitic) igneous rock, medium to dark in color. Color is such a poor indicator of rock identification in most cases, that it can only be a first approximation. Here, however, the amphibile phenocrysts put this specimen in the intermediate range. Return to Classification pdf version Return to Previous Rock Tectonic Association Andesite, as with all intermediate rocks, is found principally in volcanic arc systems, either intraoceanic volcanoes (e.g. Japan, Aleutian Islands), or cordilleran systems (Andes mountains). It characteristically forms composite explosive volcanoes. Tectonic Cross Section - pdf version LSF Home Geology Web Sites ... JMU Geology Last Update: 9/29/00 e-mail: (Fichtels@jmu.edu)

18. Porphyry Island Black Bay Peninsula in Lake Superior. Lava flows, greygreen basalt. No facilities. http://www.ontarioparks.com/English/porp.html

Skip over main navigation to content. Welcome Park Locator News / Parks Blog ... Feedback Natural Features Porphyry Island is the last island in a chain stretching southwest from the Black Bay Peninsula. It is generally flat to rolling with little relief and the rugged shoreline offers little shelter. The rocks of the peninsula and the island are of Late Precambrian age and consist of more than 300 distinctive lava flows. These ancient volcanic flows are typically grey-green basalt intermixed with minor amounts of sedimentary rocks. Geologists call these rocks the Osler Group. The island and nature reserve take their name from the characteristic quartz and feldspar crystals, or porphyries found in the volcanic rocks. The nature reserve is on the southern margin of the boreal forest. Its interior supports a mixed forest dominated by white birch in the south and balsam fir in the north. Wetlands with concentrations of black spruce are also found here. Lichens are commonly seen draping mature trees and as barrens intermixed with hardy flowering plants along rocky shorelines. The rocky shores also support arctic species, like encrusted saxifrage, insectivorous butterwort and the sedge. Of greater interest is the presence of devil's club in the forest. Populations of this thorny shrub here, and on adjacent islands, are the only known occurrences east of the Rocky Mountains.

19. St. Porphyry Of Gaza - Saint Of The Day - American Catholic No sooner had porphyry been consecrated bishop then he was accused by the local pagans of causing a drought. When rains came shortly afterward, http://www.americancatholic.org/Features/SaintOfDay/default.asp?id=1891

20. Porphyry's Against The Christians: The Literary Remains By R. Joseph Hoffman A Sunshine for Women s Book Summary Read excerpts from this attempted reconstruction of porphyry s _Against the Chrisitans_. http://www.pinn.net/~sunshine/book-sum/porphyry.html

Sunshine for Women Book Summaries Home Porphyry's Against the Christians: The Literary Remains R. Joseph Hoffman Oxford University Press 1994 Fifteen volumes long, Against the Christians was written by the Roman pagan Porphyry circa 280 and was an educated man's studied attack on Christian theology. An exceedingly powerful and successful work, it and commentaries on it were condemned by the imperial church in 448 and burned. Only remnants which were contained in books that were primarily about other matters have survived until the present. As you will see, Porphyry used a literal interpretation of the Bible, a scathing wit, and an attack on Christian's intelligence, integrity, and morals (piety, loyalty to the state, and character) to undermine the new, up-start religion, Christianity. This book is divided into 2 parts: part one contains translations of Porphyry's writings while part two contains Hoffman's analysis of Porphyry's writings. 1) Referring to Mark 16:18, Porphyry writes: "In another passage Jesus says: "These signs shall witness to those who believe: they shall lay hands on the sick and they shall recover. And if they drink any deadly drug, it will hurt them in no way." Well then: the proper thing to do would be to use this process as a test for those aspiring to be priests, bishops or church officers. A deadly drug should be put in front of them and [only] those who survive drinking it should be elevated in the ranks [of the church].

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