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GRAIN-SIZE INDICES, CLASSIFICATION AND ENVIRONMENT.
- Source :
-
Sedimentology . 1968, Vol. 10 Issue 2, p83-100. 18p. - Publication Year :
- 1968
-
Abstract
- Indices based on Wentworth phi values of Q1, Md and Q3 are used for textural classification of sediments. Wentworth phi values enable a detailed subdivision. A nomenclature based on the Wentworth phi indices is developed. The indices, and to a smaller degree the names, show sorting and skewness based on integer phi units. The classification scheme gives a continuous scale from gravel to fine clay. The Q1MdQ3-indices can be used for distinction of river, marine and loess deposits. The addition of indices of the 1st and 99th percentile, giving 5-digit indices, augments the Possibilities for a determination of the environment: river deposits can be distinguished from beach and dune sediments and in more detail from shallow marine and coastal deposits. The indices can be handled by data-processing machines. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00370746
- Volume :
- 10
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Sedimentology
- Publication Type :
- Academic Journal
- Accession number :
- 10161287
- Full Text :
- https://doi.org/10.1111/j.1365-3091.1968.tb01101.x