Once tree rings from one general area are compared with corresponding patterns observed in another area it is compiled as a set of data and crossdating has been achieved.
Through many over-lapping ring chronologies, what is called a master dendrochronology can be defined and used to interpret past conditions more precisely.
The purpose of this lab is to learn the basic field, lab, and computational procedures necessary to conduct dendrochronological research.
In essence, crossdating involves a form of pattern matching.
For each core that we have, we need to gain a high confidence in the actual date that we assign to each ring.
This is important to consider because useful trees for dendrochronology are often found near zones of their natural range.
The site selection principle recognizes that certain species of trees propagate and survive better in certain conditions than others do.
By using dendrochronology scientists have dated certain living trees or their root systems in certain cases as having ages in excess of what is expected given the Biblical chronology of the global flood.
National Geographic reported in April of 2008 These types of findings are used by evolution proponents to aid their debate in silencing anything related to Biblical chronology.
The uniformitarian principle is the assumption that present day physical and chemical processes responsible for the environmental change that producet tree-ring formations is the same today as it has been in the past.
The limiting factor principle is one which states that rings can only form as fast as the limiting factor.
The science being practiced that is causing these apparent old ages for trees that couldn't possibly of existed so long, Kullman's findings present a case that is disputed by Gerald Aardsma who found that trees can produce multiple rings in a wet year.
As well as one of the founders of the modern creation science movement, Walter Lammerts, who documented in the lab that trees can also display extra rings in short drought periods.
Many factors of a tree growth patterns have to be taken into account, however in some cases one factor may be left out as potential data due to isolation of a different factor that requires study.