current recordset does not support updating ado - Absolute or radiometric dating

The layers of rock are known as "strata", and the study of their succession is known as "stratigraphy".

Fundamental to stratigraphy are a set of simple principles, based on elementary geometry, empirical observation of the way these rocks are deposited today, and gravity.

absolute or radiometric dating-47absolute or radiometric dating-61absolute or radiometric dating-89

There are situations where it potentially fails -- for example, in cave deposits.

In this situation, the cave contents are younger than both the bedrock below the cave and the suspended roof above.

Most of these principles were formally proposed by Nicolaus Steno (Niels Steensen, Danish), in 1669, although some have an even older heritage that extends as far back as the authors of the Bible.

A few principles were recognized and specified later.

This document is partly based on a prior posting composed in reply to Ted Holden.

Last modified 15-Jul-2018 14:54