Flashcards in Dating Techniques Deck (7)
What is Relative Dating?
Not getting an actual year, but trying to figure out if something is older or younger.
What is an example of Relative Dating?
Stratigraphy - the study of layers.
Dark layers indicate fire; first evidence of fire goes back a million years.
What Law deals with Relative Dating?
Law of Superposition; important when using the idea of index fossils; younger on top.
What is a Biological Dating Technique?
Dendrochronology - ring tree dating. Works only in temperate regions, and needs live trees available in the cultural context.
What are Dating Techniques based on Radioactive Decay?
K/Ar Dating - Volcanic activity; finds dates around human activity; half-life 1.25 billion years.
C14 Dating - 60 000 years; half-life 5 730; precise date
What Dating Technique is based on Radiation Damage?
Thermoluminescence - background radiation; used for hearths.