Project Gutenberg 2010-09-18 Public domain in the USA. 171 Udden, Johan August 1859 1932 Udden, J. A. (Johan August) 19027126 Fossil Ice Crystals: An Instance of the Practical Value of "Pure Science" Produced by Chris Curnow, Iris Gehring and the Online Distributed Proofreading Team at https://www.pgdp.net (This file was produced from images generously made available by The Internet Archive) "Fossil Ice Crystals: An Instance of the Practical Value of 'Pure Science'" by Udden is a scientific publication written in the early 20th century. This work primarily focuses on the significance of geological observations, particularly the study of fossilized ice crystal markings found in various sedimentary rocks. Udden aims to demonstrate how seemingly insignificant geological phenomena can have important practical applications, particularly in the context of understanding and locating natural resources. In the text, Udden recounts his fieldwork that led to the discovery of peculiar ice crystal markings in fossilized rock layers across different locations, including the Black Hills, South Dakota, and various sites in Texas. He meticulously documents his observations, detailing the formation and patterns of these ice crystals and their implications for understanding past climatic conditions and geological processes. Eventually, he illustrates the practical value of his findings in the context of mining geology, showing how knowledge of these crystal patterns can help locate valuable ore deposits. Udden’s work emphasizes the intertwined nature of pure scientific inquiry and practical applications in geology. (This is an automatically generated summary.) Reading ease score: 59.2 (10th to 12th grade). Somewhat difficult to read. en Fossils Ice GB Text Category: Science - Earth/Agricultural/Farming 55545 2025-10-13T14:08:09.138378 text/html 49530 2021-01-07T00:39:50 text/html 1047628 2025-10-13T14:08:15.610372 application/epub+zip 1045639 2025-10-13T14:08:12.933378 application/epub+zip 74667 2025-10-13T14:08:11.607382 application/epub+zip 1259924 2025-10-13T14:08:17.418356 application/x-mobipocket-ebook 1248760 2025-10-13T14:08:14.721387 application/x-mobipocket-ebook 163000 2022-09-15T11:37:25.082906 application/x-mobipocket-ebook 39429 2025-10-13T14:08:08.642379 text/plain; charset=us-ascii 39063 2021-01-07T00:39:50 text/plain; charset=us-ascii 18174 2025-10-13T14:08:17.554342 application/rdf+xml 25444 2025-10-13T14:08:12.110346 image/jpeg 4648 2025-10-13T14:08:11.855390 image/jpeg 1000138 2021-01-07T00:39:50 application/octet-stream application/zip 14254 2021-01-07T00:39:50 application/octet-stream application/zip 1111049 2025-10-13T14:08:09.179368 application/octet-stream application/zip Archives containing the RDF files for *all* our books can be downloaded at https://book.klll.cc/wiki/Gutenberg:Feeds#The_Complete_Project_Gutenberg_Catalog