Relative dating rocks

The Laws of Relative Dating — Mr. Mulroy's Earth Science

Sometimes only one method is possible, reducing the confidence researchers have in the results. “They’re based on ‘it’s that old because I say so,’ a popular approach by some of my older colleagues,” says Shea, laughing, “though I find I like it myself as I get more gray hair.” Kidding aside, dating a find is crucial for understanding its snificance and relation to other fossils or artifacts.

Relative dating — Science Learning Hub

Methods fall into one of two categories: relative or absolute.

Evolution -- <em>Dating</em> Methods

Evolution -- Dating Methods

Paleomagnetism: Earth’s magnetic polarity flip-flops about every 100,000 to 600,000 years.

Everything Worth Knowing About. Scientific Dating Methods.

The polarity is recorded by the orientation of magnetic crystals in specific kinds of rock, and researchers have established a timeline of normal and reversed periods of polarity.

Relative dating rocks:

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