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The difference in the mineral composition is apparent in the rocks’ color and grain texture....

Compare and Contrast Argentina and Brazil

Exchanging GoodsOf course once you have gold, silver, or copper it will be of differingpercentages of purity, and finding companies who are willing to exchangepaper money for your previous materials will result in a spectrum of dollarvalues per ounce of material you bring them.

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1864-1874
, Edward Perceval Wright, William Bookey Brownrigg and William Hellier Baily
William Hellier Baily (a) and Joseph Dinkel (b)
Figure (b)
"The Uneasy Correspondence between T.H. Huxley and E.P. Wright on Fossil Vertebrates Found in Jarrow, Co. Kilkenny (1865-67)" by DeArce, Monaghan and Jackson in
Ireland is (alas) but for many years, the Emerald Isle was known for the oldest amphibian fossils on record. Found in 1864, an assemblage of plant and animal fossils from the Jarrow Coal Mine in County Kilkenny included 320-million-year-old amphibian fossils. William Brownrigg first reported on the fossils to the Royal Geological Society of Ireland (RGSI). He initially stated fossils belonged to "six, if not seven, perfectly new genera of reptile," when in fact, they were amphibians, but that view was soon amended. The real blunders in this story came afterwards, and had little to do with confusing amphibians and reptiles. Edward Wright, a member of the RGSI who had encouraged Brownrigg to collect the fossils, decided to bring in an international expert on amphibians: T.H. Huxley. Huxley, perhaps not entirely aware of the research that had already been done, was happy to help. He soon wrote to Charles Lyell, "I returned last night from a hasty journey to Ireland, whither I betook myself on Thursday night, being attracted vulture-wise by the scent of a quantity of carboniferous corpses." Huxley and Wright divvied up the science-paper-writing duties; Huxley would formally describe the fossils while Wright would pen the introduction. But DeArce, Monaghan and Jackson report, "A comparison between Brownrigg's initial presentation and Wright's introductory paper shows that the latter had just copied the former." Wright then gave his only copy of his part of the paper to a journalist who, as Wright and Huxley's publication deadline approached, wasn't returning it. Meanwhile, William Baily, acting paleontologist in the Geological Survey of Ireland, sent a letter to saying credit for the fossil discovery belonged to Wright and Brownrigg (not Huxley) and furthermore, he (Baily) had examined the fossils before Huxley had. Baily followed up that claim by presenting his watercolor of one of the specimens, dated November 1865, at the RGSI meeting on December 13, 1865. In the end, the scientist associated with the named species was Huxley. Baily eventually received a small grant from the British Association for the Advancement of Science to examine other fossils. When their paper was finally published, Huxley and Wright were at least gracious enough to mention Brownrigg multiple times, but in 1868, he resigned from the RGSI, and he sold his Jarrow fossil collection to the British Museum a few years later. As for the Jarrow amphibians, 20th-century finds eventually knocked them from their oldest-amphibians pedestal, but they enjoyed that status for more than a century.

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Weathering is the decomposition of rocks, soils and their minerals through direct …


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We are celebrating International Youth Day this year (August 12th) with an essay competition in India. We are inviting all schools in the Pune region to get involved, and we’ve provided a selection of topics for children to write about.

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Use activities in this compare and contrast unit, complete with dozens of appealing topics and grade levels, to interest all your students and strengthen your class's understanding of this important reading skill.

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1825

"The Geological Society and its Official Recognition, 1824-1828" by Patrick J. Boylan in
This is not a goof. It's just to pretty to ignore. In the 1820s, London's Geological Society was on the hunt for recognition, including a Royal Charter of Incorporation, and rent-free digs for its meetings and collections. An early president of the society, William Buckland, secured those prizes, but something else eluded him. He wanted the society to have its own coat of arms, and the process was pretty formal, including "applying to the College of Heralds for a Grant of Arms," according to historian Boylan. Though Buckland failed to secure an official seal, he and fellow geologist Henry De la Beche tossed around ideas, including this charming sketch. (Buckland made his own coat-of-arms sketch, but it couldn't compare to De la Beche's.) An ichthyosaur and plesiosaur act as playful "heraldic supporters" for a shield, which itself bears a cross-section of a fossil-rich cave in the upper left, an ammonite trio in the upper right, and an idealized geological section of part of the Alps across the bottom. Above the shield is the traditional weapon-wielding arm, but instead of the customary knife, this one wields a geological hammer. The Geological Society did settle on a logo decades later. It was polished and professional, but far less interesting.