- Geologic Age Dating Explained - Kids Discover
- Evolution -- Dating Methods
- The Laws of Relative Dating — Mr. Mulroy's Earth Science
- Relative dating - pedia
Geologic Age Dating Explained - Kids Discover
Paleomagnetism: Earth’s magnetic polarity flip-flops about every 100,000 to 600,000 years.
Evolution -- 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.
The Laws of Relative Dating — Mr. Mulroy's Earth Science
Biostratraphy: One of the first and most basic scientific dating methods is also one of the easiest to understand.
Relative dating - pedia
Layers of rock build one atop another — find a fossil or artifact in one layer, and you can reasonably assume it’s older than anything above it.
Relative dating rocks:
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