(n.) A grayish blue building stone, as that commonly used in the eastern United States.
Example Sentences:
(1) The first site we explored was a big burial cairn in the shadow of Carn Menyn, where the Stonehenge bluestones come from."
(2) The first bluestones, the smaller standing stones, were brought from Wales and placed as grave markers around 3,000BC, and it remained a giant circular graveyard for at least 200 years, with sporadic burials after that, he claims.
(3) The celebrated geologist Herbert Henry Thomas linked the Stonehenge bluestones with Preseli in 1923 and pinpointed the tor on Carn Meini as the likely source.
(4) It has long been known that the bluestones that form Stonehenge’s inner horseshoe came from the Preseli hills in Pembrokeshire, around 140 miles from Salisbury Plain.
(5) Bevins, who has been studying the geology of Pembrokeshire for over 30 years, said: "I hope that our recent scientific findings will influence the continually debated question of how the bluestones were transported to Salisbury Plain."
(6) Although the double-decker bus height sarsens are undoubtedly the most impressive, Darvill and Wainwright believe they were essentially an architectural framework for the bluestones, just as towering medieval cathedrals grew over the shrines of saints.
(7) the Bluestone 9 steps test (tympanometry) and the measurement of the opening pressure with a pressure transducer during Valsalva and swallowing.
(8) Rob Ixer, of University College London, who also took part in the new research, said: "Almost everything we believed 10 years ago about the bluestones has been shown to be partially or completely incorrect.
(9) At 4.43am on 21 June, when the sun rises above the rolling plains of Wiltshire and, cloud willing, its rays come fingering their way through the grass to touch the mighty sarsens and bluestones of the Henge, it will be a moment of joy for all concerned: the battles of the past between druids, crusties, conservators, archaeologists, seers and sightseers are over – thousands of them will be there, ready to celebrate the dawn of a new age for the Neolithic.
(10) Archaeologists have argued for centuries about what Stonehenge really meant to the people who gave hundreds of thousands of hours to constructing circles of bluestones shipped from Wales, and sarsens the size of double-decker buses dragged across Salisbury plain.
(11) It would be wrong to strike the bluestones now, and in any case they have settled into the earth so they can no longer resonate, but it adds to the mystery and delight of the stones to know that the shrine is not just an observatory but a place where the music of the spheres plays on a cosmic glockenspiel.
(12) Although they concede Stonehenge was probably "multifunctional", possibly also serving as a giant calender marking the solstices, as well as a site of ancestor worship, they are convinced its true importance came from the modest bluestones, the size of a man or smaller, dwarfed by the awesome sarsens.
(13) It was the magical bluestone - spotted dolomite, which when newly quarried is dark blue speckled with brilliant white stars of quartz - that made Stonehenge the Lourdes of prehistoric Europe, they believe.
(14) BBC3 has an extraordinary track record – it's been home to Gavin & Stacey, Little Britain, Bad Education and, right now, Bluestone 42.
(15) More research will be done to establish if the important person buried there played a role in the moving of bluestone 190 miles from west Wales to the Wiltshire monument.
(16) Some experts believe the bluestones – rather than the much larger sarsen stones that give Stonehenge its familiar shape – were the real draw because they were believed to have healing powers.
(17) This article appeared in Guardian Weekly , which incorporates material from Le Monde • This article was amended on 26 November 2013 to correct the name and details of the company Bluestone Global Tech
(18) The find has been made by professors Tim Darvill and Geoffrey Wainwright, who have spent the last 10 years trying to establish how and why the bluestones – or spotted dolerite – were transported from the Preseli hills to Stonehenge.
(19) Two of the original bluestones were broken, many chipped into fragments, and some survive only as stumps underground, after being broken up to serve as healing talismans.
(20) One of the many huge puzzles remains how the bluestone from Wales travelled 190 miles to the heart of south-west England.
Olivine
Definition:
(n.) A common name of the yellowish green mineral chrysolite, esp. the variety found in eruptive rocks.
Example Sentences:
(1) The study demonstrates that the partial substitution of olivine can reduce the concentration of free silica to acceptable health levels.
(2) Olivine inhalation also suppressed splenic PFCs and alveolar macrophage phagocytosis, but to a lesser degree than silica.
(3) Two factories were singled out for specific attention: one where asbestos was used in calcium silicate brick production and one where olivine, used as a raw material, may have been contaminated with natural mineral fibers and where the production process would have exposed workers to coal-tar pitch volatiles.
(4) Olivine is a magnesium iron silicate (Mg, Fe) SiO4 which occurs in nature and contains little or no free silica.
(5) A method for cryogenically grinding and separating (by size) fibrogenic minerals in the 1-micron size range is described and verified for chrysotile asbestos, quartz, forsterite (an olivine), and tantalum with a battery of analytical tests.
(6) The foundry was surveyed once before the substitution of olivine and three times after the changeover.
(7) A comparative study was done in mice on the effects of silica and olivine inhalation.
(8) In animals tested after 570 days of dust exposure, it was determined that the ability to lyse allogeneic tumor cells in vitro was impaired by olivine slightly more than by silica, while antibody-dependent cell-mediated cytotoxic and mitogenic responses by splenic lymphocytes were unchanged by inhalation of either dust.
(9) Field tests were carried out to compare the air quailty in a gray iron foundry before and after changing the molding material from the standard silica based sand to the mineral olivine.
(10) Previous studies have shown that silica exposures in the cleaning of castings can be reduced or eliminated through the use of mold coatings, which minimize sand burn-in on the casting surface; by application of high-velocity, low-volume exhaust hoods; and by the use of a nonsilica molding aggregate such as olivine.
(11) They are the radium-bearing Peitou stones, an unusual occurrence of uraniferous zone at Sanhsia, and uranium precipitation in the glassy olivine basalt in a tea field at Tachi.
(12) A laboratory study of the interaction of H2O frost with samples of the minerals olivine (Mg,Fe)2SiO4 and pyroxene (Mg,Fe)SiO3 at -11 degrees C to -22 degrees C revealed that an acidic oxidant was produced.