According to the Dictionary of Anthropology, the word chronology means the science of computing dates or treaties showing arrangement of events with dates.
In other words, Chronology is the arrangement of events, or the materials which represent them, in the order of their occurrence in time.
They are engaged in defining the stages of hominid evolution and their artifactual record, and the assignment of a chronology to these stages.
Chronology is the science of measuring time and ordering of the things in time.
Any study of the origins of human must be set in a chronological context.
The application of varve dating is restricted by several factors.
With the help of stratigraphic position of the site or with the help of some associated finds dates of the site can be derived relatively, whereas with the help of several absolute dating around the world, archaeologists are now able to construct a single, multiregional time frame for all hominid evolution.
First, it is because varve accumulation occurs only to glacial areas of the world.
Second, many of the Pleistocene glacial areas has receded nowadays and affecting the supply of sediments.
Besides these two a number of other absolute method like thermo luminescence, dendrochronology, Electron Spin Resonance etc.
also proved very helpful for dating various events of the past.