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K/Ar Ages layer
The K/Ar Ages layer shows all the potassium/argon ages from the National Geochronological Database.
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| K/Ar ages of Connecticut |
K/Ar ages of Arizona |
Details
Rock type
Rock type the dating sample is from
Mineral
Mineral or phase dated
Age
Age of sample in millions of years (m.y.), with analytical error of calculated age
Age comment
Informative text about the estimated age or the material analyzed
Analysis type
Method of K/Ar dating
Precision
Description of location precision
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Options
Transparency
Determines how much the underlying layer(s) will show through this layer.
Shape
The shape used to represent the data points
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Origin
This data layer can be obtained from the U.S. Geological Survey.
Abstract
This data set, dds14kar, is a subset of the National
Geochronological Data Base (NGDB), as published in 1995. It
shows the distribution of published K/Ar and Ar/Ar age
determinations in the United States. Sample location,
rock description, analytical data, age, interpretation,
and literature citation is given for each record.
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