Colag garil ful xx - Radiometric dating detrital minerals sedimentary rocks gives

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.

radiometric dating detrital minerals sedimentary rocks gives-28

They are the "initial working hypotheses" to be tested further by data.

Using these principles, it is possible to construct an interpretation of the sequence of events for any geological situation, even on other planets (e.g., a crater impact can cut into an older, pre-existing surface, or craters may overlap, revealing their relative ages).

Despite this, the "principle of cross cutting relationships" can be used to determine the sequence of deposition, folds, and faults based on their intersections -- if folds and faults deform or cut across the sedimentary layers and surfaces, then they obviously came after deposition of the sediments.

You can't deform a structure (e.g., bedding) that is not there yet!

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

My thanks to both him and other critics for motivating me.

For example, the principle of superposition is based, fundamentally, on gravity.

In order for a layer of material to be deposited, something has to be beneath it to support it.

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

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