Outline of geology Index of geology articles. Retrieved 2 February Main article: It is based on the fact that radiocarbon 14 C is constantly being created in the atmosphere by the interaction of cosmic rays with atmospheric nitrogen. Views Read Change Change source View history. Our sample wheel holds 39 samples.
Levels of 14 C are affected significantly only by the passage of time.
From Wikipedia, the free encyclopedia. It was also Mr. The main mechanism that brings deep water to the surface is upwelling, which is more common in regions closer to the equator. It provides more accurate dating within sites than previous methods, which usually derived either from stratigraphy or from typologies e. Archived PDF from the original on