Results 91 to 100 of about 4,773 (290)
V.—The Constitution of the Igneous Rocks [PDF]
Geological Magazine, 1909 In a paper read at the 1903 meeting of the British Association and afterwards published in this Magazine, the method of calculating the chemical constitution of the igneous rocks by the collation of analyses was criticized, and the results were compared with those based on actual field-work in an area where such rocks were very abundant. Mr. F.
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Boreas, Volume 52, Issue 1, Page 42-59, January 2023., 2023 Palynological and sedimentological analyses were performed on the sediment core HH16‐1205‐GC retrieved from the central Isfjorden, West Spitsbergen. The sequence, which spans the last 7000 years, revealed an overall cooling trend with an important climate shift between 4.4 and 3.8 cal. ka BP, in addition to millennial‐scale oscillations.
Camille Brice +4 more
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Challenges of identifying putative planetary-origin meteorites composed of non-igneous material [PDF]
arXiv, 2018 This concept article discusses the challenges of identifying planetary-origin meteorites of non-igneous composition, primarily of sedimentary origin, distinct from SNC meteorites. The paper reviews evidence on putative sedimentary-origin meteorites and potential parent bodies for sedimentary meteorites.
arxiv
Journal of Natural Gas Geoscience, 2019 Large-scale Permian igneous rock is developed in the Hanilcatam area, Tarim Basin. In order to accurately capture influences of thick igneous rock on seismic imaging of its underlying strata based on actual drilling, well logging and 3D seismic data, the
Dong Sun +7 more
doaj
XXI. The Igneous Rocks of Bute [PDF]
Transactions of the Geological Society of Glasgow, 1916 The geological claims of Bute seem always to have been overshadowed by the near presence of Arran, with its superior size and variety of formations. MacCulloch, in his “Geology of the Western Islands” (1819, p. 445), devotes some space to emphasising the importance of Bute geologically, and then dismisses the island in twenty-nine pages. Bryce, in his “
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Fractal and FractionalIn the current context of the global energy landscape, China is facing a growing challenge in oil and gas exploration and development. It is difficult to evaluate the log data because of the lithological composition of igneous rocks, which displays an ...
Shiyao Wang +3 more
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Towards OWL-based Knowledge Representation in Petrology [PDF]
arXiv, 2011 This paper presents our work on development of OWL-driven systems for formal representation and reasoning about terminological knowledge and facts in petrology. The long-term aim of our project is to provide solid foundations for a large-scale integration of various kinds of knowledge, including basic terms, rock classification algorithms, findings and
arxiv
Energies, 2018 Understanding how mining-induced strata movement, fractures, bed separation, and ground subsidence evolve is an area of great importance for the underground coal mining industry, particularly for disaster control and sustainable mining.
Weibing Zhu, Shengchao Yu, Jingmin Xu
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A Fracture-Surface in Igneous Rock [PDF]
Nature, 1920 THE accompanying photograph (Fig. 1) was taken by me some years ago during the construction of the Shirawta Dam, Bombay Hydro-Electric Works, India. It shows a curious fracture surface due to a heavy gelignite detonation in finely crystalline “trap” rock. So far as I can remember I had seen other examples of this phenomenon, but photographed this as it
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The relationship between cellular protein content and selenium accumulation in freshwater microalgae
Integrated Environmental Assessment and Management, EarlyView.Abstract Variability in the bioconcentration of selenium (Se) by primary producers at the base of the food web results in uncertainty in predictions of bioaccumulation and ecological risk to higher trophic level organisms. Water chemistry, speciation of Se, and periphyton community composition have all been suggested as factors that contribute to ...
Courtney Bogstie +3 more
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