stages {divDyn} | R Documentation

## 95 bin Phanerozoic time scale based on the stratigraphic stages of Ogg et al. (2016).

### Description

Stage-level (age-level) timescale used in some analyses.

### Usage

    stages

### Format

A `data.frame` with 95 observations and 10 variables:

`sys`

  Abbreviations of geologic systems.

`system`

  Geologic periods.

`series`

  Geologic series.

`stage`

  Names of geologic stages.

`short`

  Abbreviations of geologic stages.

`bottom`

  Numeric ages of the bottoms boundaries (earliest ages) of the bins.

`mid`

  Numeric age midpoints of the bins, the averages of `bottom` and `top`.

`top`

  Numeric ages of the tops (latest ages) of the bins.

`dur`

  Numeric ages of the durations for the bins.

`stg`

  Integer number identifiers of the bins.

`systemCol`

  Hexadecimal color code of the systems.

`seriesCol`

  Hexadecimal color code of the series.

`col`

  Hexadecimal color code of the stages.

### Details

This is an example time scale object that can be used in the Phanerozoic-scale analyses. Example occurrence datasets related to the package use the variable `stg` when referring to this timescale.

### References

Ogg, J. G., G. Ogg, and F. M. Gradstein. 2016. A concise geologic time scale: 2016. Elsevier.

### Source

Based on Ogg et al. (2016), compiled by Wolfgang Kiessling.

[Package divDyn version 0.8.0 Index]