rysgran (version 1.0)

rysgran-package: Grain size analysis, textural classifications and distribuition of uncosolidated sediments.

Description

This package is a port to R of the SysGran program, written in Delphi by Camargo (2006). It contains functions for the analysis of grain size samples (only in phi scale in this version) based on various methods, like Folk & Ward (1957) and Methods of Moments (Tanner, 1995), among others; textural classifications and distribuition of uncosolidated sediments are shown in histograms, bivariated plots and ternary diagrams of Shepard (1954) and Pejrup (1988). English and portuguese languages are supported in outputs.

Details

ll{ Package: rysgran Type: Package Version: 1.0 Date: 2011-03-07 License: GPL (>= 2.0) LazyLoad: yes }

References

- Folk, R. L. and Ward W. C. (1957) Brazos river bar: A study in the significance of grain size parameters. Journal of Sed. Petrol., 27: 3--27. - McCammon, R. B. (1962) Efficiencies of percentile measurements for describing the mean size and sorting of sedimentary particles. Journal of Geology, 70: 453--465. - Otto, G. H. (1939) A modified logarithmic probability paper for the interpretation of mechanical analysis of sediments. Journal os Sed. Petrol., 9: 62--76. - Pejrup, M. (1988) The triangular diagram used for classification of estuarine sediments: a new approach. in: Tide-influenced sedimentary environments and facies. BOER, P.L. ; GELDER, A. & NIO, S.D. (Eds). D. Reidel Publishing Company. Holland. - Shepard, F. P. (1954) Nomenclature based on sand-silt-clay ratios. Journal Sedimentary Petrology, 24:151--158. - Tanner, W.F. (1995) Environmental clastic granulometry. Florida Geological Survey, Special Publication 40. 142 pp. - Trask, P. D. (1930) Mechanical analysis of sediments by centrifuge. Economic Geology, 25: 581--599.

See Also

gran.stats , class.percent , rysgran.hist , rysgran.plot , rysgran.ternary

Examples

#Example 1
#grain size analysis using
#Folk & Ward with verbal classification
library (rysgran)
data (camargo2001)
tab <- camargo2001
gran.stats (tab, method="folk" , verbal=TRUE)
##
##
#Example 2
#weight percentages
library (rysgran)
data (camargo2001)
tab <- camargo2001
class.percent (tab, mode="total", empty.col=FALSE)
##
##
#Example 3
#histograms
library (rysgran)
data (camargo2001)
tab <- camargo2001
rysgran.hist (tab , ordered = TRUE)
##
##
#Example 4
#bivariated plot
library (rysgran)
data (camargo2001)
tab <- camargo2001
rys <- gran.stats (tab, method="folk", verbal=FALSE)
rysgran.plot ("mean" , "sort" , data = rys)
##
##
#Example 5
#ternary diagram of Shepard
library (rysgran)
data (camargo2001)
tab <- camargo2001
percent <- class.percent(tab, mode="total", empty.col=FALSE, lang="en-US")
rysgran.ternary  (x = percent[2:4], method = "shepard")