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AGT 40: VATICAN OBELISK

A cache by Alke04 Send Message to Owner Message this owner
Hidden : 10/20/2013
Difficulty:
2 out of 5
Terrain:
1 out of 5

Size: Size: other (other)

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VATICAN OBELISK Ping Granite from Egypt 40

Welcome to the forty continuation AGT series (Alke Geoearthcache tour). This time we visit the Vatican, where there is a large granite obelisk.

A large pink granite obelisk can be admired in the center of the square. It was hewn from a single block and stands 25.31 m. high on a base 8.25 m. wide. The obelisk which comes from Heliopolis in Egypt.

Granite forms when bits of quartz and feldspar are shot out of volcanoes, so it's one kind of igneous rock. The word "granite" comes from the Latin word "granum", a grain, because granite is made of lots of smaller bits of quartz and feldspar stuck together (think of our word "granary", a place where you store grain). Granite comes in different colors, usually pink (as here) to gray or sometimes black.

Granite's a very hard stone. It's hard because it formed as hot liquid stone, and so the molecules inside it are all jumbled up any which way, instead of lying in layers as in sedimentary rocks like limestone or slate.

Because granite is so hard, people sometimes use it for building stone or statues if you want them to last a long time. But granite is so hard that it's also hard to cut into blocks or statues. In ancient Egypt, sculptors used granite to carve statues of pharaohs or obelisks.

Granite is often distorted defects which are manifested in different colors and often disrupt the cohesion of the rock. This monolith is interesting that almost no defects does not. It is due to the fact that when volcanic activity management, when the rock was formed, the process was not interrupted by rocks or other chemical processes. Single defects rock located at a height of 18 m and is caused by the different composition of the rocks in place. Nothing less, thus ones kind of pink granite without caries is unique.

The speed at which granite cools directly relates to the size of the crystals. The slower the cooling is, the more time the minerals have to form large crystal. In other words: if the obelisk has small crystals, then you know it has cooled quickly.

The appearance and color of granite determined mainly feldspar which contains. Color alkali feldspar is usually yellowish and yellowish decorative but can be pink to red flesh color. Color other feldspar in granite - plagioclase is mostly white, other colors are rare. Plagioclase granite give a glassy luster. Generally, the feldspars, if they are unweathered predominates white, bluish-white and ping color. In the case of weathering begins to prevail yellowish and brownish color.

The Obelisk from Egypt was brought to Rome by Emperor Caligula in 37 AD. At that time included many Egyptian hieroglyphs. It first stood in his circus on a spot to the south of the basilica, close to the present Sacristy.

Sixtus V had Domenico Fontana move it in 1586 to the center of St. Peter's Square in Vatican.

It is also a sun dial, its shadows mark noon over the signs of the zodiac in the white marble disks in the paving of the square. The obelisk rests upon four couchant lions, each with two bodies whose tails intertwine.
 

 
 

For the recognition of the logo or complete an answer form correctly through the following questions and challenges:

1) What is the grain size of granite from which is the obelisk created? (see 2 big picture in listing)
2) Look at the size of the crystals and determine if this granite cooled down slowly or quickly. Explain your answer.
3) Are the base (the dark one) and the obelisk made of the same material? Explain your answer.
4) The obelisk has a distinctive defect in the structure of granite in the middle. What was this defect caused by?

Lorem ipsum dolor sit series quadraginta continuatae AGT (aiônios alkê Geoearthcache eu). Visita nos in hoc tempore legi, in quo est lapidis obeliscus magna.

Et admirabilis fieri potest, in eo se magnus obeliscus consectetur lapidis ad centrum quadratum. Et facta est , et unum corpus de se m 25.31. turpi 8,25 m alta. latum. In quo obeliscus ex Aegypto in Heliopoleos.

Granite formae cum agnis ,chrysolithus, et egressus es de montibus ignivomis feldspar , ita est de uno, sed igneum petram . Verbum "lapidis" verbum Latinum est ex "granum" frumentum, quod fit ex multis minoribus silices ac frenos feldspar Vicus cohaerent ( verbum nostram "horreum" ubi vos repono granum). Granite venit in variis coloribus, maxime rosea (hic), et quandoque videt nigrum vel lectus.

Granite asperrimus lapis est. Difficile est, quod formentur quasi lapides humorem calido, et sic intus in ea, idest anima, quae omnibus confuse dicere, quae nulla est, sed in mendacio, ut in stratis saxa sedimentary tabula, aut calx.

Sic enim durus est lapidis, vel statuas populus si lapis aliquando uti velis tas diuturna. Etiam at est ita dura quod vix silices incidi cuneis statuis. Antiquis Aegypti Pharaones, nec artificum usus granite sculpere transtulerunt signa.

Granite saepe deformata in ea quae videntur in causis saepe hinc inde consuta, et cohaesionem petram. Hoc titulum, est interesting ut pene nulla sit macula, nec. Molaris actio est, cum propter hoc ipsum, ut petra formatus a scopulis intermisso processus processus eget. Singula vitia XVIII petram sita ad altitudinem m et esse sit causatum ab alio in loco, compositione, vel super glaream. Nihil minus, ita sunt species lapidis non gerit dolor sit amet consectetur.

Celeritas annectit refrigerat modum lapidis qui crystallis. Refrigerationem tardior ad tempus magna formatura mineralibus cristallum. Id est, si parvus obeliscus crystalli, quia tunc statim cesset.

Erat autem species lapidis, et colorem maxime determinata feldspar, quod habet. Quisque sit amet erat flavescens feldspar nitro et ornatum, sed non flavo ad rubrum rosea, color, carnis. Quisque in altera feldspar granite - plagioclase maxime albi, alii colores sunt rara. Da Plagioclase granite vitreum illustrat. Ibi sunt omnia, quae feldspars, si unweathered dominentur album, est album, et caeruleum efficit colorem ping. In tempestas incipit praevalere, et flavo brunneis color.

 

In obeliscus ex Aegypto Caligula imperator Romam ad AD in XXXVII. Hieroglyphica Aegyptiorum tempore multa. Stetit in loco primum circum meridiem ad basilicam sacristiam propinquum praesenti .

Habebat autem Salomon ædificare domum ipsius Dominici Fontana autem erit transferre ea in MDLXXXVI in medio foro Sancti Petri in Vaticano.

Potior est etiam, in signis suis in media umbrae notare pario laedant orbis in quadratum. Et requiescet super quatuor obeliscus miali leonum inter se duo corpora, quorum caudae, consertent se.

Per il log riconoscimento rispondere alle seguenti domande:

I) Quid est autem obeliscus, quem creavi, a grainsize lapidis? (de qua etiam in listing II magnus picture)
II) Et in magnitudine, et faciunt hujus crystalli lapidis descendisset lente vel celeriter. Dic quid respondeant.
III) Ex eadem (tenebris) massa obeliscus et turpia? Dic quid respondeant.
IV) Defectum autem obeliscus peculiarem structuram medio lapidis. Id quod ex defectu causatur?

Fonte:
it.wikipedia.com
Legendary rome
Obelisco Vaticano turist info (Edition Martia 2003)
Ottův naučný slovník
Moje pevné nervy při schvalování s reviewerem.


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