binfordRho: binfordRho

In shiggo/jezioro: Tools for Paleolimnological Analyses at the Paleoecological Environmental Assessment and Research Laboratory

Description

binfordRho calculates the percent water and dry sediment density for the individual samples of a sediment core freeze-dried in preparation for gamma dating. The values for intervening (i.e. non-prepared samples) are interpolated.

Usage

binfordRho(d, bagwt=3.25, subsample=TRUE, coreD=7.62)

Arguments

d	matrix or data frame containing the input data
bagwt	(defaults to 3.25): average weight (g) of your brand/size of "Whirlpak" bags
subsample	(Defaults to TRUE): logical to indicate whether the samples were subsampled before freeze-drying
coreD	(defaults to 7.62):inner tube diameter (cm) of the sediment corer used to collect the core

Details

binfordRho interpolates the values of dry sediment density needed for dating a sediment core from the dry masses of the freeze-dried intervals and the bag weights of wet sediment (by calculating and interpolating percent water). The data to be examined should be in the form of a matrix or data frame with the following 7 columns:

• INTTOP: depth (cm) to the top of the analyzed interval

• INTBOT: depth (cm) to the bottom of the analyzed interval

• WT_SED+BAG: mass (g) of the wet sediment and the WhirlPak bag

• WT_VIAL: mass (g) of the empty vial used for freeze drying (disregarded if subsample=FALSE)

• WT_VIAL+SED: mass (g) of the vial after adding the subsample of wet sediment (disregarded if subsample=FALSE)

• WT_FD = mass (g) of the vial of sediment after freeze drying (if subsample=FALSE, this value should instead be the mass (g) of the dry sediment and the Whirlpak bag)

• WT_GAMMA: mass (g) of freeze-dried sediment added to the gamma tube

NOTE: Columns 1-3 must have values for the entire core length. Columns 4-7 will only have values for the intervals prepared for dating by freeze-drying, with the values for non-prepared intervals left blank. If the entire "Whirlpak" bag was freeze-dried (i.e. subsample=FALSE), then Columns 4-5 should be left blank and the mass (g) of the bag of sediment after freeze drying entered into Column 6.

Value

binfordRhoOutput table of results for use with the binfordDates function.

Author(s)

Adam Jeziorski, Joshua Thienpont

Examples

#Imports the example rho data for a sediment core subsampled prior to freeze-drying
data(binfordRhoInput)
binfordRho(binfordRhoInput)

shiggo/jezioro documentation built on Sept. 7, 2020, 7:34 p.m.