ANTA01H3 Lecture Notes - Lecture 4: Iridium Anomaly, Radiocarbon Dating, Absolute Dating
Document Summary
Something is older by something else, but doesn"t tell you how old the thing actually is. A is older than b and c, but won"t tell you a is 15,000 years old. Absolute dating: (chromatic dating) provides age and actual date. It"s not absolute, there is an error range. Think about processes that make up surface of earth, generally lay down a layer of something. Stuff you find may tell you the age of the geological site: e. g. If flood, there is a layer of flood, or eruption there is layer of lava: human activities can produce layers lay down all kinds of garbage. Younger layers are on top of older layers. Analogy: if you throw garbage every day in the same bin, there are layers. More towards the bottom, the older it is. This idea can be wrong due to alterations in layers: e. g. human burial. When buried, the dirt used to cover up the hole disrupts the layers.
