How To Use Porphyry In A Sentence
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Red Rivers, which are tinged with red mud, derived from rocks of porphyry and red gypseous clays in 'the far west.'
The Harvard Classics Volume 38 Scientific Papers (Physiology, Medicine, Surgery, Geology)
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This rare work of porphyry, limestone, serpentine and onyx is unique north of the Alps.
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This is particularly well known to collectors familiar with porphyry copper deposits of Arizona, New Mexico, and Utah.
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It is scarcely more previous than the underlying limestones, and why a solution that could penetrate and leach ores from it should be stopped at the upper surface of the blue limestone is not obvious; nor why the plane of junction between the porphyry and the _blue limestone_ should be the special place of deposit of the ore.
Scientific American Supplement, No. 446, July 19, 1884
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The so-called porphyry copper mines, which now produce more than half the world's copper, are worth looking at in the context of exploitation limits.
Limits to Exploitation of Nonrenewable Resources (historical)
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p 239 active volcanoes is always manifested in the chain of the Andes by the appearance of certain rocks (as dolerite, melaphyre, trachyte, andesite, and dioritic porphyry), which divide the so-called primitive rocks, the transition slates and sandstones, and the stratified formations. the constant recurrence of this phenomenon convinced me long since that these sporadic rocks were the seat of volcanic phenomena, and were connected with volcanic eruptions.
COSMOS: A Sketch of the Physical Description of the Universe, Vol. 1
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For Sorabji his financial gain was the continuation of his municipal salary, so that he could keep his school open, rather than a craven payment for services rendered to the Christian authorities; he did not betray his friends; he did not betray philosophy, since he merely preferred the teaching of Porphyry in the matter of divine names and theurgy to that of Iamblichus and Proclus.
The Garbage House
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Instead of agreeing with Iamblichus 'insistence on theurgy as indispensable to reaching spiritual union with God, a doctrine largely taken over by Proclus, Ammonius harmonized Aristotle with Plato by siding with Porphyry's (232-309) view that names were imposed by humans and, Sorabji suggests, he also agreed with Porphyry's refusal to accept the efficacy of theurgy in purifying the intellect and hence leading us to God.
The Garbage House
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The 126 bandwidth hyperspectral survey data provides far superior resolution than space borne platforms such as ASTER and has the ability to identify the specific hydrothermal alteration minerals (such as dickite and alunite) that are commonly associated with epithermal and porphyry related deposits.
Marketwire - Breaking News Releases
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Most beautiful marble of various colours is to be found, and also enormous quantities of mica and amianth; porphyry and porphyroid granite, carbonated and hydroxided iron, argillaceous schist, mica schist.
Across Unknown South America
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It contained a kind of pantheistic theology closely analogous to those of Porphyry and
Initiation into Philosophy
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The erupted rocks which have broken through and upheaved these strata have been elevated from depths that are wholly inaccessible to our research; they must, therefore, have existed under the silurian strata, and been composed of the same association of minerals which we term granite, augite, and quartzose porphyry, when they are made known to us by eruption through the surface.
COSMOS: A Sketch of the Physical Description of the Universe, Vol. 1
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They also noted that much kaolin is in or near decomposed porphyry bodies that overlie the largest ore shoots in the Leadville Dolomite.
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The principal measured reserves are in the so-called porphyry coppers of the United States and Chile.
The Economic Aspect of Geology
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Other possible occurrences include porphyry copper deposits that contain enargite at depth, such as Chuquicamata, Chile.
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It is well known that the stream of the Mississippi is charged with sediment of a different colour from that of the Arkansas and Red Rivers, which are tinged with red mud, derived from rocks of porphyry and red gypseous clays in the far west.
II. Uniformity Of Change
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Aegyptiaca of this very building, are such monstrous misrepresentations of nature, that they never could have obtained a place among the statues of Rome, except as curiosities of foreign superstition, or on account of the materials, as they are generally of basaltes, porphyry, or oriental granite.
Travels through France and Italy
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A boyhood spent on the cliffs at Kirkcaple had made me a bold cragsman, and the porphyry of the Rooirand clearly gave excellent holds.
Prester John
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The fastigium was altered in the early eighteenth century by the substitution of panels of ornamental motifs for porphyry panels in the smaller squares.
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The entrance foyer of the Rand Club is dominated by huge simulated porphyry columns and a grand staircase leading to a colonnaded gallery.
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Although closely associated with plutonic igneous rocks, porphyry mineralization commonly encompasses large volumes of the surrounding host rocks to the intrusion.
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But even though his criticisms are mainly addressed to Aristotle, Boethius, and Porphyry, his more general opinion of Aristotelianism was, of course, formed by what he saw in his own time.
Lorenzo Valla
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The reference to emerald stone probably indicates color rather than medium, which suggests that the statue was carved of green basalt, granite, porphyry, or serpentine.
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Some of the finest cuprite specimens ever found have come from the oxidized zones of several of Arizona's porphyry copper and related deposits.
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When the Pope leads Mass at the newly complete altar - made, as part of Bonet's design, from a purplish stone called porphyry - 6,500 faithful, including 1,000 priests, will pray with him.
Yahoo! News: Business - Opinion
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The Main Channel conglomerate is made up of a variety of well-rounded felsite, granophyre, and quartz-feldspar porphyry pebbles, suggesting a geologically diverse source terrane.
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Final polishing will only succeed on the hardest of stones, such as granite, porphyry, and gemstones, and again abrasive materials will be used for this, including abrasive powders or salts.
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‘The numerals of Pythagoras,’ says Porphyry, ‘were hieroglyphical symbols, by means whereof he explained all ideas concerning the nature of all things.’
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Following up the stream I came to some rapids, where the stream is crossed by large beds of hornstone and porphyry rocks, excessively hard, and pitched up at right angles, or with a bold dip to the north.
Himalayan Journals — Complete
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At least two Eocene feldspar porphyry dykes or sills intrude Tsa da Glisza, and appear to have followed the same planes of weakness as the aplite dykes.
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Final polishing will only succeed on the hardest of stones, such as granite, porphyry, and gemstones, and again abrasive materials will be used for this, including abrasive powders or salts.
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Granite and alabaster were also imported with precious materials such as porphyry to give richness and lustre to interiors.
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The mine workings occupy much of the west side of an isolated low hill composed mainly of light-colored volcanic rock, described as felsite porphyry or trachyte, highly altered to clay minerals.
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Yet here, as we are told by Richthofen and others, there must once have been a great eruptive centre, breaking out again and again, and each time throwing up a different kind of rock: – first Syenite; then Tourmaline granite; then Uralite porphyry; then melaphyr; then, last of all, porphyrite, and the unique Syenite porphyry, famous for its crystals, and unknown elsewhere.
Untrodden Peaks and Unfrequented Valleys
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Copper Creek has known mafic rocks within the district such as andesitic volcanics and diabase, older than and surrounding the existing porphyry hosted resources which remain open to expansion in most directions.
The Earth Times Online Newspaper
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The sedimentary beds are composed mainly of poorly sorted subangular to rounded clasts of felsite and rhyolite porphyry that are typically a red color.
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The vast fissures which were formerly open in the solid crust of the earth have since been filled up or closed by the protrusion of elevated mountain chains, or by the penetration of veins of rocks of eruption (granite, porphyry, basalt, and melaphyre); and while, scarcely more than four volcanoes remaining through which fire and stones are erupted, the thinner, more fissured, and unstable crust of the earth was anciently almost every where covered by channels of communication between the fused interior and the external atmosphere.
COSMOS: A Sketch of the Physical Description of the Universe, Vol. 1
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Throughout the week, unusually large amounts of crustae (marble revetment slabs) have been found that are mainly composed of green-white cipollino from Euboia, purple veined pavonazetto marble from Dokimeion, white marble, and even some small pieces of red porphyry, which is a type of igneous rock.
Interactive Dig Sagalassos - Roman Baths Report 6
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The ore body grades below into a zone characterized by lean chalcopyrite, which is supposed to represent original or primary deposition from hot waters associated with the porphyry intrusion.
The Economic Aspect of Geology
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This rare work of porphyry, limestone, serpentine and onyx is unique north of the Alps.
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The Cretaceous rhyolite - porphyry is the main parent rock Of the deposit , extending inNE - orientation.
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The great calendar-stone, which in 1790 was disinterred in the city of Mexico, was nicely wrought out of a block of dark porphyry, that is estimated to have weighed fifty tons, and must have been transported several leagues; for the nearest point where porphyry of that character is found is upon the shores of Lake Chalco, many miles distant from the city of Mexico.
Ancient Mining on the Shores of Lake Superior
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Porphyry solves this dilemma by insisting that the so-called Aristotelian categories ” substance, quality, quantity etc., dealt with in the Categories ” are
Porphyry
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'Euphotide' and serpentine, containing sometimes crystald of augite and uralite instead of diallage, are thus nearly allied to another more frequent, and I might almost say, more 'energetic' eruptive rock -- augitic porphyry.
COSMOS: A Sketch of the Physical Description of the Universe, Vol. 1
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Approaching it from this side you pass through a dense bryanthus-fringed grove of mountain hemlock, catching glimpses now and then of the colossal dome towering to an immense height above the dark evergreens; and when at last you have made your way across woods, wading through azalea and ledum thickets, you step abruptly out of the tree shadows and mossy leafy softness upon a bare porphyry pavement, and behold the dome unveiled in all its grandeur.
The Yosemite National Park
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Not that these things (as I said of fasting) are to be discommended of themselves, but very behoveful in some cases and good: sobriety and contemplation join our souls to God, as that heathen [6459] Porphyry can tell us.
Anatomy of Melancholy
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Finally the hardest stones such as granite and porphyry require the most tempered steel tools.
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Near the opening of the mountain, where the water is found, at some distance below the highest summit, I found the rock to be porphyry of a light reddish colour, close grained, with small veins of feldspath, much resembling the porphyry I saw last year, in Wady Lamoule, beyond the Second
Travels in Nubia
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Between every tower, in the midst of the said body of building, there was a winding stair, whereof the steps were part of porphyry, which is a dark-red marble spotted with white, part of
The Best of the World's Classics, Restricted to Prose, Vol. VII (of X)—Continental Europe I
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The best examples in the period after c. 730 of collections of scholia with introductions are probably the commentaries on Porphyry's and Aristotle™s logical works by Leo Magentenos (late 12th or early to mid-13th century).
Byzantine Philosophy
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Geolog. ', t. ii., p. 379-415; on a similar effect produced by the action of dioritic and pyroxenic porphyry (the' ophite 'described by Elie de Beaumont, in the' Geologie de la France ', t. i., p. 72), between Tolosa and St. Sebastian, see Dufrenoy, in the' Mem.
COSMOS: A Sketch of the Physical Description of the Universe, Vol. 1
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Plotinus and Porphyry had worked with such a scheme, with their metaphysic of the One, Mind, and the World-Soul.
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On the east side are two shafts of reddish gray granite, in one piece, and one fine gray porphyry column with slabs of white feldspath.
Travels in Arabia
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The Main Channel conglomerate is made up of a variety of well-rounded felsite, granophyre, and quartz-feldspar porphyry pebbles, suggesting a geologically diverse source terrane.
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A porphyry obscures the contact between the Cross Slieve Group and the Red Arch Formation.
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Alteration is typical of gold porphyry deposits as exemplified by a potassic-calcic core surrounded by sericitic, intermediate argillic, and propyllitic alteration zones.
Marketwire - Breaking News Releases
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During this time, many of the district's steeply dipping, northeast-trending faults were intruded by narrow, granodiorite porphyry dikes.
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The mine workings occupy much of the west side of an isolated low hill composed mainly of light-colored volcanic rock, described as felsite porphyry or trachyte, highly altered to clay minerals.
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In 2000, fifty porphyry deposits had been identified in Chile, with reserves of 400 million tons of copper!
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The 2009 drilling program identified widespread gold mineralization associated with mineralized and altered dacite porphyry and adjacent sedimentary and volcanic rocks, drill hole DDH09-014 revealed gold mineralization of 111 meters grading up to 7.28 grams/tonne.
Marketwire - Breaking News Releases
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But the spirit of great ones was above these circumscriptions, affecting copper, silver, gold, and porphyry urns, wherein Severus lay, after a serious view and sentence on that which should contain him.
Hydriotaphia, or Urn-burial
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Not that these things (as I said of fasting) are to be discommended of themselves, but very behoveful in some cases and good: sobriety and contemplation join our souls to God, as that heathen [6459] Porphyry can tell us.
Anatomy of Melancholy
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I at first thought that it was owing to dust blown from the surrounding mountains of red porphyry; for from the magnifying power of the crystals of snow, the groups of these microscopical plants appeared like coarse particles.
Journal of researches into the geology and natural history of the various countries visited by H.M.S. Beagle
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The most famous preserved example is the porphyry group of Diocletian, Maximian, Galerius, and Constantius embracing each other, which can now be seen on the southwest corner of the Basilica di San Marco in Venice.
Caesars’ Wives
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Specifically, it is obtained from the processing of the mineral molybdenite (a molybdenum ore) that is found in porphyry copper deposits.
Rhenium
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Elevated upon pedestals of porphyry, they formed the graceful entrance to a semicircular flight of marble steps which led from the lake to a broad terrace interlaid with parti-colored marbles, in every variety of device which taste could conceive, or art execute.
The pillar of fire, or, Israel in bondage
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Rhenium is obtained almost exclusively as a by-product of the processing of a special type of copper deposit known as a porphyry copper deposit.
Rhenium
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They also noted that much kaolin is in or near decomposed porphyry bodies that overlie the largest ore shoots in the Leadville Dolomite.
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I saw only a few specimens of green porphyry, with red slabs of feldspath; the greatest part being red porphyry, and porphyry schist.
Travels in Nubia
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In the Jerome or Verde district of central Arizona, folded pre-Cambrian greenstones and sediments were invaded by masses of quartz-porphyry, and after further deformation, rendering many of the rocks schistose, were intruded by an augite-diorite.
The Economic Aspect of Geology
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The fault places massive fractured greenstones over relatively undeformed feldspar andesite porphyry.
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An apartment of the Byzantine palace was lined with porphyry: it was reserved for the use of the pregnant empresses; and the royal birth of their children was expressed by the appellation of _porphyrogenite_, or born in the purple.
History of the Decline and Fall of the Roman Empire — Volume 4
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This mine, just north of the Mount Tolman porphyry molybdenum-copper deposit, was once Washington State's sole fluorite producer, with 235 tons shipped between 1918 and 1940.
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Porphyry or some other caviller, [275] may object, that this is fabulous, because the reason of it does not appear; or because it is unusual; or because it is repugnant to the common order of nature.
Commentary on Genesis - Volume 1
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All eruptive rocks penetrate, as ramifying veins either into the sedimentary strata, or into other equally endogenous masses; but there is a special importance to be attached to the difference manifested between 'Plutonic' rocks* (granite, porphyry, and serpentine) and those termed 'volcanic' in the strict sense of the word (as trachyte, basalt, and lava).
COSMOS: A Sketch of the Physical Description of the Universe, Vol. 1
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The columns were of malachite and porphyry, and the panels of _rosso antico_ with scrolls of _lumachella_.
The Altar Steps
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Vatican a magnificent porphyry labrum found in one of the imperial baths; and Baccius, a great modern authority on baths, speaks of labra made of glass.
Museum of Antiquity A Description of Ancient Life
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Most beds are almost monomictic, comprising quartz-feldspar porphyry clasts, whereas some other beds are highly heterogeneous.
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Porphyry was observed on several spots; indurated clay frequently; and, on the top of the hill below which we encamped, I found quartz porphyry, and at the foot a psammite? which I had met several times associated with talc-schiste.
Journal of an Overland Expedition in Australia : from Moreton Bay to Port Essington, a distance of upwards of 3000 miles, during the years 1844-1845
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The porphyry, which is of warm brown or chocolate colour, includes many crystals of lighter coloured felspar, and dark crystals of hornblende.
Gold, Sport, and Coffee Planting in Mysore
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The ore is associated with plagiogranite porphyry of Mesozoic age.
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There was also a very hard variety of granite much used by sculptors called porphyry, a very hard and variegated rock of a mixed purple-and-white colour.
From John O'Groats to Land's End
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An apartment of the Byzantine palace was lined with porphyry: it was reserved for the use of the pregnant empresses; and the royal birth of their children was expressed by the appellation of porphyrogenite, or born in the purple.
History of the Decline and Fall of the Roman Empire — Volume 4
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There were a number of unusual features - the proportion of gilding to porphyry, the use of scagliola, the use of liners, the lack of comparable design: these points largely arise from Petitot's design.
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Full of magnificent mosaics with what seem to be portraits of the same sort as those found on the porphyry monuments of the tetrarchs in the 290s and early 300s, it nonetheless remains mysterious.
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Plotinus and Porphyry felt reserve towards participation in sacrifices to propitiate the spirits.
