Radiometric dating of the earth
I found several good sources, but none that seemed both complete enough to stand alone and simple enough for a What is radiometric dating?
Simply stated, radiometric dating is a way of determining the age of a sample of material using the decay rates of radio-active nuclides to provide a 'clock.' It relies on three basic rules, plus a couple of critical assumptions.
My last post, on the tectonic origins of the Dead Sea and Jordan Valley, brought me face-to-face once again with one of the most striking pieces of evidence for an ancient earth that I am aware of. This graph shows that the so-called historical sciences and observational sciences that Ken Ham touts can both reach the same conclusions. The data don’t reveal anything that hasn’t been common knowledge among geologists for a long time.
Inclusions rich in calcium and aluminum – the oldest known solid constituents within meteorites that are formed within the Solar System – are 4.567 billion years old, suggesting an age for the Solar System and an upper limit for the age of Earth.
Plates are moving at different speeds with some moving away from each other and other running into each other.
How the plates interact explains much about the origins of earthquakes and volcanoes. It compares two different estimates of how quickly the earth’s plates are moving in the Middle East.
Studies of strata, the layering of rock and earth, gave naturalists an appreciation that Earth may have been through many changes during its existence.
These layers often contained fossilized remains of unknown creatures, leading some to interpret a progression of organisms from layer to layer.