hirnantian {paleoAM} | R Documentation |
Katian-Hirnantian Graptolite Assemblages Reported by Sheets et al. (2016)
Description
This is a data set of relative abundances for planktonic graptolite species from two sections that cross the Katian-Hirnantian boundary in the late Paleozoic.
Format
This dataset is composed of two objects:
- graptCommData
A data table of sample IDs and relative species abundances.
- graptSampleInfo
A data table of additional locality and geologic age information related to each sample.
Details
This data set contains the relative abundances (proportion of specimens identified) for 43 species of planktonic graptolites, across 34 samples taken from two outcrops: (a) a section at Vininni Creek in Nevada, USA, and (b) a second section at Blackstone River in the Yukon, Canada. Both of these sections cross the Katian-Hirnantian boundary and the relative abundances reported here were provided as supplementary material with Sheets et al. (2016).
Source
Sheets, H. David, Charles E. Mitchell, Michael J. Melchin, Jason Loxton, Petr Štorch, Kristi L. Carlucci, and Andrew D. Hawkins. "Graptolite community responses to global climate change and the Late Ordovician mass extinction." Proceedings of the National Academy of Sciences 113, no. 30 (2016): 8380-8385.
See Also
Examples
data(hirnantian)
########################
# # (This is not to be run, just showing how data was loaded)
#
# # Sheets et al. community abundance data
# graptCommData <- read.csv(
# "grapt_abundances_Sheets_et_al_Vinini&Blackstone_01-09-22.csv"
# , row.names = 1, header = TRUE
# )
#
# # sample specific info
# graptSampleInfo <- read.csv(
# "grapt_siteData_SheetsEtAl.csv",
# row.names = 1, header = TRUE,
# stringsAsFactors = TRUE
# )
#
# save(graptCommData, graptSampleInfo,
# file = "data/hirnantian.Rdata")