How is archaeological dating accomplished?

Dendrochronology, Carbon dating and Potium Argon dating, just the name a few. They test the radioactive decay in the method of the half-life to get the approximate date. This is not done on Dendrochronology though, that is tree ring dating, Different weather in the year leads to tree rings to grow small or large and they take a sample core of the tree ring and count the rings, literally. All these methods give a certain amount of time to determine how old something along with a geology survey that shows the bottom layers are older than the top. Of course the dating methods are done on several samples several times from the same site to see that they watch up.