KPgLastOccurrences.rdata {DAIME}

Last occurrences for the K/Pg boundary and a potential influence of Deccan volcanism

Description

Contains last occurrences generated by a spike in extinction rate at the K/Pg boundary and an influence of Deccan volcanism before that. Relative influence of volcanism ranges from 0% (none), 10 % (weak), 20% (intermediate), 30 % (strong) to 40% (very strong). Location of Deccan volcanism is based on the extinction interval from Tobin (2017), fig. 5, transformed into time assuming a constant deposition rate. The last occurrences were generated based on the convolution procedure described in Hohmann (2018) and a rate of fossil occurrences of 40 fossils per Myr.

Usage

data(KPgLastOccurrences)

Format

A list with five entries, each named after the intensity of the early extinction pulse described in Hohmann (in preparation). Each of these entries contains three vectors: 'val' contains the last occurrences per Myr at the ages in 'age', and 'parameters' contains the parameters used to create the pattern of last occurrences.

Source

Hohmann, Niklas. 2018. Quantifying the Effects of Changing Deposition Rates and Hiatii on the Stratigraphic Distribution of Fossils. <doi:10.13140/RG.2.2.23372.51841>.

References

Hohmann, Niklas. (2018). Reversing Time Averaging and Reconstructing Extinction Rates with Approaches from Image Processing. DOI 10.1101/408864.

Tobin, Thomas S. "Recognition of a likely two phased extinction at the K-Pg boundary in Antarctica." Scientific reports 7.1 (2017): 1-11.

Examples

data(KPgLastOccurrences)
KPgLastOccurrences$Intermediate.Deccan$parameters
plot(KPgLastOccurrences$Intermediate.Deccan$age,
  KPgLastOccurrences$Intermediate.Deccan$val,type='l',
  xlim=rev(range(KPgLastOccurrences$Intermediate.Deccan$age)),xlab='Age [Ma]',
  ylab='Last Occurrences [per Myr]')