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Daniel Tilas
Daniel Tilas (11 March 1712 – 17 October 1772) was a Swedish mineralogist, mine expert, and an early pioneer of geology. The word feldspar was coined by Tilas although spelled as ''feldspat'' in the original. He was also among the early observers of stratigraphy. The mineral Tilasite is named after him. Tilas was born in Gammelbo, Västmanland where his father Olof was a wealthy landowner, titled knight in 1719 and his mother Maria was daughter of the scientist Urban Hjärne. He was educated at home by tutors before going to the University of Uppsala in 1723 where he studied natural sciences and Latin, interacting with Carolus Linnaeus. Tilas became an assistant in the Office of Mines in 1732 where he was involved in administering the Swedish mining industry. He began to map mineral resources and then saw a need to produce a geological map. He inspected mines across the region and made collections of rocks and minerals. Unfortunately, the collections and his notes were destroyed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Daniel Tilas
Daniel Tilas (11 March 1712 – 17 October 1772) was a Swedish mineralogist, mine expert, and an early pioneer of geology. The word feldspar was coined by Tilas although spelled as ''feldspat'' in the original. He was also among the early observers of stratigraphy. The mineral Tilasite is named after him. Tilas was born in Gammelbo, Västmanland where his father Olof was a wealthy landowner, titled knight in 1719 and his mother Maria was daughter of the scientist Urban Hjärne. He was educated at home by tutors before going to the University of Uppsala in 1723 where he studied natural sciences and Latin, interacting with Carolus Linnaeus. Tilas became an assistant in the Office of Mines in 1732 where he was involved in administering the Swedish mining industry. He began to map mineral resources and then saw a need to produce a geological map. He inspected mines across the region and made collections of rocks and minerals. Unfortunately, the collections and his notes were destroyed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Feldspar
Feldspars are a group of rock-forming aluminium tectosilicate minerals, also containing other cations such as sodium, calcium, potassium, or barium. The most common members of the feldspar group are the ''plagioclase'' (sodium-calcium) feldspars and the ''alkali'' (potassium-sodium) feldspars. Feldspars make up about 60% of the Earth's crust, and 41% of the Earth's continental crust by weight. Feldspars crystalize from magma as both intrusive and extrusive igneous rocks and are also present in many types of metamorphic rock. Rock formed almost entirely of calcic plagioclase feldspar is known as anorthosite. Feldspars are also found in many types of sedimentary rocks. Compositions The feldspar group of minerals consists of tectosilicates, silicate minerals in which silicon ions are linked by shared oxygen ions to form a three-dimensional network. Compositions of major elements in common feldspars can be expressed in terms of three endmembers: * potassium feldspar (K-spar) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stratigraphy
Stratigraphy is a branch of geology concerned with the study of rock (geology), rock layers (Stratum, strata) and layering (stratification). It is primarily used in the study of sedimentary rock, sedimentary and layered volcanic rocks. Stratigraphy has three related subfields: lithostratigraphy (lithologic stratigraphy), biostratigraphy (biologic stratigraphy), and chronostratigraphy (stratigraphy by age). Historical development Catholic priest Nicholas Steno established the theoretical basis for stratigraphy when he introduced the law of superposition, the principle of original horizontality and the principle of lateral continuity in a 1669 work on the fossilization of organic remains in layers of sediment. The first practical large-scale application of stratigraphy was by William Smith (geologist), William Smith in the 1790s and early 19th century. Known as the "Father of English geology", Smith recognized the significance of Stratum, strata or rock layering and the importance ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tilasite
Tilasite is an arsenate mineral gemstone, with the elemental formula Ca Mg( As O4) F. It prefers the monoclinic form of crystal, and has Mohs hardness of 5. It was named in 1895 by Hjalmar Sjögren in honor of Daniel Tilas, who was once director of mines for Sweden, and a regional governor for Västmanland. It was first discovered in Langban, Varmland. In 1972, Bladh et al. characterised samples found near Bisbee, Arizona. In 1994, Bermanec discovered centro-symmetric Tilasite near Nezhilovo, North Macedonia North Macedonia, ; sq, Maqedonia e Veriut, (Macedonia before February 2019), officially the Republic of North Macedonia,, is a country in Southeast Europe. It gained independence in 1991 as one of the successor states of Socialist Feder ....Bermanec V (1994) "Centro-symmetric tilasite from Nezilovo, Macedonia: a crystal structure refinement" Neues Jahrbuch für Mineralogie, Monatshefte 1994 289-294 References Fluorine minerals Arsenic minerals Magnesium ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Västmanland
Västmanland ( or ), is a historical Swedish province, or ''landskap'', in middle Sweden. It borders Södermanland, Närke, Värmland, Dalarna and Uppland. Västmanland means "(The) Land of the Western Men", where the "western men" (''västermännen'') were the people living west of Uppland, the core province of early Sweden. Administration The traditional provinces of Sweden serve no administrative or political purposes (except sometimes as sport districts), but are historical and cultural entities. In the case of Västmanland the corresponding administrative county, Västmanland County, constitutes the eastern part of the province. The western part is in Örebro County where the municipalities of Hällefors, Lindesberg, Ljusnarsberg and Nora are located. Heraldry The coat of arms was granted in 1560. At the time it featured one fire mountain, to represent the mine of Sala Municipality. Soon, their numbers were increased to three, to also symbolize the Lindesberg and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Urban Hjärne
Urban Hjärne (20 December 1641 – 10 March 1724) was a Swedish chemist, geologist, physician and writer. Biography He was born at Skworitz near Nyenschantz in Swedish Ingria. He was the son of vicar Erlandus Jonæ Hiærne (1596–1654) and Christina Tomasdotter Schmidt (1615–1682). He was admitted in 1655 to the high school gymnasium in Dorpat. He went to Arva, where he studied until 1657. He entered Uppsala University in 1658. He began his medical education at Uppsala in 1661. For several years he visited Northern Europe's leading research center for medicine. He travelled to the Netherlands, England and France. In 1670 he became a doctor of medicine at Angers, France. In 1674 he settled as a physician in Stockholm where his practice primarily served the aristocracy. In 1669 he was elected a Fellow of the Royal Society. He was appointed first physician to the King Charles XI of Sweden in 1684 and was ennobled in 1689. He became assessor of the Board of M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uppsala University
Uppsala University ( sv, Uppsala universitet) is a public university, public research university in Uppsala, Sweden. Founded in 1477, it is the List of universities in Sweden, oldest university in Sweden and the Nordic countries still in operation. The university rose to significance during the rise of Swedish Empire, Sweden as a great power at the end of the 16th century and was then given a relative financial stability with a large donation from King Gustavus Adolphus of Sweden, Gustavus Adolphus in the early 17th century. Uppsala also has an important historical place in Swedish national culture, identity and for the Swedish establishment: in historiography, literature, politics, and music. Many aspects of Swedish academic culture in general, such as the white student cap, originated in Uppsala. It shares some peculiarities, such as the student nation system, with Lund University and the University of Helsinki. Uppsala belongs to the Coimbra Group of European universities a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl Linnaeus
Carl Linnaeus (; 23 May 1707 – 10 January 1778), also known after his ennoblement in 1761 as Carl von Linné Blunt (2004), p. 171. (), was a Swedish botanist, zoologist, taxonomist, and physician who formalised binomial nomenclature, the modern system of naming organisms. He is known as the "father of modern taxonomy". Many of his writings were in Latin; his name is rendered in Latin as and, after his 1761 ennoblement, as . Linnaeus was born in Råshult, the countryside of Småland, in southern Sweden. He received most of his higher education at Uppsala University and began giving lectures in botany there in 1730. He lived abroad between 1735 and 1738, where he studied and also published the first edition of his ' in the Netherlands. He then returned to Sweden where he became professor of medicine and botany at Uppsala. In the 1740s, he was sent on several journeys through Sweden to find and classify plants and animals. In the 1750s and 1760s, he continued to collect an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hollis Dow Hedberg
Hollis Dow Hedberg (May 29, 1903 – August 14, 1988; nickname: "El Doctor Hedberg") was an American geologist specializing in petroleum exploration. His contribution to stratigraphic classification of rocks and procedures is a monumental work which received universal acceptance. The firm he worked for, the Gulf Oil Corporation in Venezuela, trusted his findings and explored what had until then been uncharted territory. As a result, they reaped huge benefits from their petroleum findings. Hedberg taught at Princeton University from 1959 until his retirement in 1971. He was awarded the Mary Clark Thompson Medal by the National Academy of Sciences in 1973. In 1975 he was awarded the Wollaston Medal by the Geological Society of London. Hedberg won the Sidney Powers Memorial Award in 1963. Early life Hollis Dow Hedberg was born on 29 May 1903 in Falun, Kansas. He belonged to a small Swedish community and his parents lived on the second floor of the house. At that time Kansas experience ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glacial Erratic
A glacial erratic is glacially deposited rock differing from the type of rock native to the area in which it rests. Erratics, which take their name from the Latin word ' ("to wander"), are carried by glacial ice, often over distances of hundreds of kilometres. Erratics can range in size from pebbles to large boulders such as Big Rock () in Alberta. Geologists identify erratics by studying the rocks surrounding the position of the erratic and the composition of the erratic itself. Erratics are significant because: *They can be transported by glaciers, and they are thereby one of a series of indicators which mark the path of prehistoric glacier movement. Their lithographic origin can be traced to the parent bedrock, allowing for confirmation of the ice flow route. *They can be transported by ice rafting. This allows quantification of the extent of glacial flooding resulting from ice dam failure which release the waters stored in proglacial lakes such as Lake Missoula. Erratics ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Hutton
James Hutton (; 3 June O.S.172614 June 1726 New Style. – 26 March 1797) was a Scottish geologist, agriculturalist, chemical manufacturer, naturalist and physician. Often referred to as the father of modern geology, he played a key role in establishing geology as a modern science. Hutton advanced the idea that the physical world's remote history can be inferred from evidence in present-day rocks. Through his study of features in the landscape and coastlines of his native Scottish lowlands, such as Salisbury Crags or Siccar Point, he developed the theory that geological features could not be static but underwent continuing transformation over indefinitely long periods of time. From this he argued, in agreement with many other early geologists, that the Earth could not be young. He was one of the earliest proponents of what in the 1830s became known as uniformitarianism, the science which explains features of the Earth's crust as the outcome of continuing natural processes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1712 Births
Year 171 ( CLXXI) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Severus and Herennianus (or, less frequently, year 924 ''Ab urbe condita''). The denomination 171 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire * Emperor Marcus Aurelius forms a new military command, the ''praetentura Italiae et Alpium''. Aquileia is relieved, and the Marcomanni are evicted from Roman territory. * Marcus Aurelius signs a peace treaty with the Quadi and the Sarmatian Iazyges. The Germanic tribes of the Hasdingi (Vandals) and the Lacringi become Roman allies. * Armenia and Mesopotamia become protectorates of the Roman Empire. * The Costoboci cross the Danube (Dacia) and ravage Thrace in the Balkan Peninsula. They reach Eleusis, near Athens, and destr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
