Even with the variety of objects that could be used the common objects to be tested are usually Apache Tear or obsidian nodules, which is lava that comes into contact with water and cooled rapidly to produce a dark glassy look.
In time the nodule absorbs water change them into a soft gray looking rock.
Lithic technology was a core-flake reduction process that exhibited little temporal change.
Ceramics are absent and thus technological, stylistic, or luminescent dating studies are not possible.
As it currently resides as second fiddle usually to other methods it has potential to become as useful.
Obsidian hydration dating (OHD) is a geochemical method of determining age in either absolute or relative terms of an artifact made of obsidian.
Even with its short comings there is still potential on this continuously progressing method by way we are correcting mistakes and improving upon the method of obsidian hydration.
Even with this simple concept the technique was not successful because of factors not yet know by the factors of the environment, area of deposit, and composition of the obsidian that dramatically affected the data results.
The reconstruction of time is a central concern all archaeologists must address in their research; few, however, are fully aware of the potential of all the dating methods at their disposal.
For this reason, this paper summarizes the developmental history and current level of field application of obsidian-hydration dating.
The samples collected must also know the area, depth, climate temperature, elevations, and other assurances but I will focus on what typically needs to be known.
There are many types of machines to use in examining the samples like infrared photo-acoustic spectroscopy (IR-PAS), scanning electron microscopy (SEM), secondary ion mass spectrometry (SIMS), X-ray fluorescence (XRF), and energy dispersive X-ray fluorescence (EDXRF) but in this exhibit I will be give examples of two different laboratory journals of Alexander K.