List of obsidian dating labs

list of obsidian dating labs-82

The result is a thin cross-section of the surfaces of the artifact.

The prepared slide is measured using an Olympus BHT petrographic microscope fitted with a video micrometer unit and a digital imaging video camera.

Narrow rinds (under approximately two microns) are usually examined under a higher magnification.

Hydration rinds smaller than one micron often cannot be resolved by optical microscopy. The Failure of Obsidian Hydration Dating: Sources, Implications, and New Directions.

Hydration thicknesses are reported to the nearest 0.1 micron and represent the mean value for all readings.