In the 1920s, an astronomer by the name of A. E. Douglass discovered that the seasons caused trees to suspend their growth in the winter and resume it in the spring. This interruption and subsequent resumption of growth resulted in an annual formation of a discernible tree ring, and a distinctive pattern of tree rings in a cross-section of a fallen tree. Because each ring corresponds to a year, and the pattern corresponds to the local environment, the tree-ring patterns can be overlapped with one another, and used to quite literally count, year by year, back in time. This method can be used to date some archaeological structures to thousands of years. 

Some chronometric dating methods can be applied to volcanic materials. If the ash layer in the stratigraphy is volcanic in nature, which dating method would be the best to use?

Radiocarbon dating (C-14)

Stratigraphy

Dendrochronology

Potassium Argon dating (KAr)

 

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Potassium Argon dating KAr is the dating method that would be best for volcanic materials This dati... View the full answer