词条 | Diamictite |
释义 |
Unlithified diamictite is referred to as diamicton. The term diamictite is often applied to nonsorted or poorly sorted, lithified glacial deposits such as glacial tillite, and diamictites are often mistakenly interpreted as having an essentially glacial origin (see Snowball Earth). The most common origin for diamictites, however, is deposition by submarine mass flows like turbidites and olistostromes in tectonically active areas, and they can be produced in a wide range of other geological conditions. Possible origins include:[3][4]
References1. ^Flint, R.F., J.E. Sanders, and J. Rodgers (1960) Diamictite, a substitute term for symmictite Geological Society of America Bulletin. 71(12):1809–1810. 2. ^Tucker, M.E. (2003) Sedimentary Rocks in the Field John Wiley & Sons, Ltd., New York, New York. 244 pp. {{ISBN|978-0-470-85123-4}} 3. ^Eyles, N.; Januszczak, N. (2004). "’Zipper-rift’: A tectonic model for Neoproterozoic glaciations during the breakup of Rodinia after 750 Ma". Earth-Science Reviews 65 (1-2): 1-73. (pdf 4 Mb) {{webarchive|url=https://web.archive.org/web/20071128105306/http://courses.eas.ualberta.ca/eas457/Eyles_2004.pdf |date=2007-11-28 }} 4. ^Huber, H., Koeberl, C., McDonald, I., Reimold, W.U.: Geochemistry and petrology of Witwatersrand and Dwyka diamictites from South Africa: Search for an extraterrestrial component. Geochimica et Cosmochimica Acta, Vol. 65, No. 12, pp. 2007–2016, 2001. (pdf 470 Kb) Further reading
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