Minerals are found worldwide and have many uses. The mineral gypsum is just one of the thousands named. Gypsum has always been a critical mineral in the building of many ancient constructions, and is being used still in today’s construction. (The History of Gypsum, 1985) It is speculated that the first use of it was in ancient Greece, where is was called “gypsos”, or “selenite”, but, gypsum’s first recorded use was in Ancient Egypt, where they used it in the building of the Pyramids. They used the material called “Alabaster” (which is a form of gypsum), but later in the 18th century, they realized that gypsum in its natural and raw state, was much too wet, so they altered it to create the building material called “Plaster of Paris”. (The Gypsum Association, n.d.) As discussed above, there are different varieties of gypsum (five basic forms); there is alabaster, satin spar, selenite, rock gypsum, and gypsite. Alabaster is fine-grained, satin spar is very fibrous, selenite is transparent (the more gemstone looking version of gypsum), rock gypsum is the most …show more content…
It is composed of two elements; oxygen and sulfur. This mineral can either be white in colour, gray, brown, orange, green, red, pink, yellow, beige, or it can be colourless, and the streak that it leaves is white. Based on the Moh’s Hardness scale, Gypsum falls somewhere around the 2 margin. Its lustre is close to that of glass (in properties and in appearance), and is considered vitreous. The cleavage—where it breaks along its line of weakness—is 1,1 – micaceous ; 2,2 and its fracture is uneven. Gypsum is slightly flexible, has low hardness, where it can be scratched by a fingernail, and is sectile (can be cut with a knife). Gypsum is a sedimentary rock, meaning it was formed by cementation at the surface of the Earth near bodies of water; it causes the mineral (gypsum) to settle within the
Shown in the picture above is volcanic extrusive igneous rock known as andesite. They were imported here to Laguna Beach to help minimize erosion (Merton Hill, p. 10-11). Extrusive Igneous rocks are formed on Earths surface due to lava quickly cooling or mixing with different materials such as ash or cinders from an eruption. There are two different types of extrusive igneous rocks; Plutonic and Volcanic. Andesite is known for being gray in color and being made up of very coarse grainy textures, which make it much harder to break down than sedimentary rocks. Unlike loose gravel and other sediments igneous rocks are known for being able to slow down seismic waves from earthquakes which cause less damage to surface structures.
10.4) In animal cells cytokinesis involves the formation of a cleavage furrow which pinches the cell in two. While in plants cells cytokinesis involves the division of cytoplasm by late telophase, so the daughter cells appear shortly after the end of mitosis.
Quartzite is a non-foliated metamorphic rock. This rock is intrusive and forms when exposed to extreme amounts of heat and pressure. Over a billion years ago, there was an ocean where Kamiak Butte is. This ocean floor was made of sand, as time went on oceans receded and the exposed sand underwent processes that turned it into sandstone – or as we learned in class the process of lithification. Years later, this sandstone would morph into the quartzite that is present now.2
Travertine TRAVERTINE is a form of massive calcium carbonate, CaCO3 resulting from deposition by springs or rivers. It is often beautifully colored and banded as a result of the presence of iron compounds or other (e.g., organic) impurities. This material is variously known as calc-sinter and calcareous tufa and (when used for decorative purposes) as onyx marble, Mexican onyx, and Egyptian or Oriental alabaster. Travertine is generally less coarse-grained and takes a higher polish than stalactite and stalagmite, which are similar in chemical composition and origin. Travertine, the stone of the Colosseum and St. Peters as well as of several structures in New York and Philadelphia, is not a volcanic tufa but calcareous sediment that was deposited on the ground by the hot springs that first began to flow during the earliest eruptions of the Alban volcanoes. The best quality, in fact the only reliable one in Latium, is that which is found between Bagni and the Sabine hills below Tivoli. Lanciani, who has fascinatingly described the quarries there, estimated that five and a half million cubic meters of stone had been extracted from the ancient quarry alone. And yet, because of its position under a flat grass-grown plain, the Romans did not discover the existence of this remarkable stone till after the middle of the second century B. C.; and even after that they failed for a century to develop a system of extracting the stone in a sufficiently easy way to make the extensive use of it practicable. In the later decades of the second century B. C. it displaced peperino for inscriptional monuments for obvious reasons. Its employment in large structures cannot with certainty be posited before the construction of the Mulvian bridge in 109,...
The first permanent stone fortifications was built in Jericho. They constructed the building using roughly shaped stones laid without mortar (Kleiner, 24). Once Jericho’s inhabitants left their site, a different group of people came to settle there. They used different techniques, “…established a farming community of rectangular mud-brick houses on stone foundations with plastered and painted floors and walls” (Kleiner, 25). The megalithic tomb in Ireland was built in the form of a passage grave. “At Newgrandge, the huge megaliths forming the vaulted passage and the dome are held in place by their own weight without mortar, each stone countering the thrust o neighboring stones. Decorating some of the megaliths are incised spirals and other motifs” (Kleiner, 27). The main chamber used early examples of corralled vaulting and in addition the Newgrandge tomb illuminates sunlight through the passage and the burial chamber during the winter solstice. Nearing the end of the fourth millennium BCE, Neolithic civilization had spread in every diffraction even to small remote areas. “…Hagar Quim is one of many constructed on Malta between 3200 and 2500 BCE” (Kleiner, 27).The builders of Malta constructed the temple by pilling cut stone blocks very carefully in stacked horizontal rows. “To construct the doorways at Hagar Qim, the builders employed the post-and-lintel system in which two upright stones
The Romans invented and revolutionised many innovations and technologies. Although, of all of these innovations and technologies, only one has survived unchanged for over 2000 years. Hydraulic cement-based concrete is certainly the most significant ancient Roman innovation that has come to be. Ancient Roman concrete was significant as it was cheap, and allowed the ancient world to build greater infrastructure. This in turn vitally helped revolutionise trade and many regions’ economy. Concrete also allowed long-lasting and important health systems, as well as security systems to be put into place for ancient Rome, revolutionising both health and safety across the ancient world. On top of this, to prove the significance of concrete, it is still
Basalt is a commonly occurring igneous rock. More specifically however, Basalt falls under the category of Mafic Rocks. Mafic rocks have a poor Silica content, approximately 50% (Charles, Diane, Lisa, 2010) and contain high concentrations of metal oxides. Basalt is a fine grained rock containing predominantly ferromagnesian minerals, followed by plagioclase feldspar. The colour of Basalt ranges from dark grey to black and is relatively featureless. See Fig 1.
Mycenaean sites employed Cyclopean masonry as the means of building their fortification walls. Cyclopean masonry was used at all of the fortified Mycenaean sites and it is built by using large flat-surfaced blocks with smaller stones fitted in the cracks (Dickinson, 1994). The walls would have two faces and the space would then be filled with rubble. It is believed the fortification walls were not truly meant to fortify a citadel, but were a means of displaying the city’s wealth (Loader, 1995). According to Loader (1995) Cyclopean masonry was a distinct style of Greece. The use of corbelled vaults was also common. The Mycenaeans did not know the principle of the true arch so they stacked blocks on top of one another and pushed the ends of both sides in to create a sort of vault before creating a smooth interior surface. This method requires heavy weight on the backs of the blocks used to make the vault to avoid a collapse.
jenny_eli, please do not redistribute this project. We work very hard to create this website, and we trust our visitors to respect it for the good of other students. Please, do not circulate this project elsewhere on the internet. Anybody found doing so will be permanently banned. Introduction into Limestone 83xYv Visit coursework cd in cd fo cd for cd more project cd Do cd not cd redistribute 83xYv Limestone and chalk are used in large quantities to manufacture quicklime and cement.
This website provides an overview of the use of stone in Ancient Egyptian civilisations, discussing their ability to cut stone, the use of stone in
There's three basic types of sedimentary rock classic, chemical, and organic. Classic sedimentary rocks are formed from mechanical weathering debri. Examples are breccia, conglomerate, sandstone, and shale. Chemical sedimentary rocks form when dissolved materials precipitat...
- [3] ARNOLD, D, Building in Egypt, Pharaoic Stone Masonry, Oxford:Oxford University Press, 1991, pp. 159-160.
The field of geology has many different branches. Some of these areas have hardly anything in common. The one thing that they all include, though, is that each one concentrates on some part of the Earth, its makeup, or that of other planets. Mineralogy, the study of minerals above the Earth and in its crust, is different from Petrology, the st...
There are two types of Igneous rocks. The first is intrusive, which is when the magma slowly cools beneath the earths surface. Because the magma is cooling slowly it allows the rocks end result to form crystal- like pigments. Examples of intrusive igneous rocks are Diorite, Gabbro, Granite, Pegmatite, and Periodotite. All of these rocks are course and grainy. The other type is an extrusive Igneous rock. This lava erupts onto the surface of the earth and cools rapidly also forming crystals, the lava cools so fast that at times it allows the rocks to form as clear-like glass. Examples of these rocks are Andesite, Basalt, Obsidian, Pumice, Rhyolite, Scoria,
Metallurgy is the field of materials science and material engineering that studies the physical and chemical behaviour of metallic elements, their microstructure compounds and their mixtures, which are mostly known as alloy. Metallurgy can be refers as the technology of metals where science is applied to the production of metals, and the engineering of metal components for the uses of products for consumers and manufacturers.