LOC: Line of Correlation

In plannapus/CONOP9companion: Tools for integrating biostratigraphic software CONOP9 in a statistical workflow

Description

Functions to derive an age model from the composite sequence.

Usage

printLOC(CONOP, events = "observed")
composite.age(CONOP, agemodels, tie.points, age.span, pch, bg)
LOC.tiepoints(CONOP, saveLOC = FALSE)

Arguments

CONOP	An object of class CONOP, typically the output of function read.CONOP.
events	A character string. Can be observed, in which case the events are plotted at the depth (or height) they have been observed, or placed, in which case they are plotted at their optimal depth (or height).
agemodels	A list of known age models with one element for each site (in the order defined in sectfile). Each element is a Two-column matrix: first column is the age value (in Ma) and the second column is the depth (in mbsf). The user can provide existing age models for any number of sites that he want (max is the number of site included in sectfile). Sites that are included in sectfile but for which no age models is given needs to be NA. E. g. two sites are present in sectfile, the first site is not provided with an age models but the second site have two tie points (10mbsf -> 1Ma and 50mbsf ->3Ma), agemodels should therefore be as follow: [[1]]NA [[2]][,1]10 50 [,2]1 3
tie.points	Output from function LOC.tiepoints
age.span	Vector of two age values (oldest, youngest) that limit the plots.
pch	See par.
bg	See par.
saveLOC	If TRUE, plots and LOC are saved in the working directory.

Details

• LOC.tiepoints: Prompt the user to interactively draw a line of correlation on depth vs composite depth diagram and return the set of tie points thus selected. Press ESC when the line is drawn to move on to the next section.

• printLOC: Plot and print depth vs composite depth (or age) diagram.

• composite.age: From a given set of tie points, translate COMPOSFILE from composite depth to numerical age values.

Value

The output of LOC.tiepoints is a list where each element corresponds to a site (the index is the same as in sectfile). In each element, an age-depth matrix is stored. The output of codecomposite.age is an object of class CONOP similar to the input with numerical age value instead of composite depth.

Author(s)

Johan Renaudie.

Examples

	data(riley)
	printLOC(riley, events="placed")

plannapus/CONOP9companion documentation built on March 18, 2021, 9:39 a.m.