Chronological sequence is all that is really required.
However, human beings love to see factual precision, and we want to know how old something is.
Please remember that all dating methods, even those termed "absolute," are subject to margins of error. That is a very small amount of possible error range. Modern studies almost always use two or more methods to confirm dating work and to build confidence in the results obtained.
Overview of Methods Superposition Stratigraphy Dendrochronology Radiocarbon C14 Radiometric Dating Methods Obsidian Hydration Dating Paleomagnetic/Archaeomagnetic Luminescence Dating Methods Amino Acid Racemization Fission-track Dating Ice Cores Varves Pollens Corals Cation Ratio Fluorine Dating Patination Oxidizable Carbon Ratio Electron Spin Resonance Cosmic-ray Exposure Dating This is an excellent overview of dating methodologies, and is a chapter in a textbook on Archaeology.
The vast majority of early FTN sites are located in the major river valleys of the Balkans, either as tell settlements or as short-lived flat sites.
The resulting data, in the form of a calibration curve, is now used to convert a given measurement of radiocarbon in a sample into an estimate of the sample's calendar age.
Other corrections must be made to account for the proportion of throughout the biosphere (reservoir effects).
In western Britain, there are examples of pottery covered with 'grass' impressions from Ulster, the Hebrides, and Cornwall, especially around the 5th-6th centuries AD.
The term also refers to crude handmade ware made in various parts of Frisia in the CATEGORY: artifact DEFINITION: Pottery embodying chopped grass or straw in its fabric as a tempering agent.