Dinosaurs: Iridium Levels in Rock Layers to Investigate Dinosaur...
In Stat2Data: Datasets for Stat2
Description
Format
Details
Source
Description
Iridium levels in prehistoric rock layers
Format
A data frame with 28 observations on the following 4 variables.
IDSample identifier
SourceType of rock (Limestone Shale)
DepthDepth of the sample (in meters)
IridiumIridium concentration (ppb)
Details
The question of interest is whether a volcanic eruption or asteroid strike had created a dust cloud that led to extinction of most dinosaurs. Rock samples taken in Gubbio, Italy were measured for the concentration of iridium (a rare metal which is more common in asteroids). The deeper the sample, the older the rocks are. A sudden increase in iridium at some point in time would lend support for the asteroid hypothesis.
Source
Ramsey, Fred L. and Daniel W. Schafer (2002). The Statistical Sleuth, 2nd ed., Pacific Grove, CA, Duxbury, pp.405-407.
Stat2Data documentation built on May 2, 2019, 7:25 a.m.
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Description Format Details Source
Description
Iridium levels in prehistoric rock layers
Format
A data frame with 28 observations on the following 4 variables.
IDSample identifier
SourceType of rock (
LimestoneShale)DepthDepth of the sample (in meters)
IridiumIridium concentration (ppb)
Details
The question of interest is whether a volcanic eruption or asteroid strike had created a dust cloud that led to extinction of most dinosaurs. Rock samples taken in Gubbio, Italy were measured for the concentration of iridium (a rare metal which is more common in asteroids). The deeper the sample, the older the rocks are. A sudden increase in iridium at some point in time would lend support for the asteroid hypothesis.
Source
Ramsey, Fred L. and Daniel W. Schafer (2002). The Statistical Sleuth, 2nd ed., Pacific Grove, CA, Duxbury, pp.405-407.
R Package Documentation
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