Pressure techniques were used to remove 83 blades from a preformed obsidian core weighing 820 grams, yielding 17.32 meters of acute cutting edge. The blades represented 91 percent of the original weight (2.1 centimeters of acute cutting edge per gram of original material), thus demonstrating the efficiency of the pressure-blade techniques for the production of acute cutting edges.

Obsidians are naturally occurring glassy volcanic rocks which have great interest and commonly preferred in engineering, medical nuclear applications. In the present study, we aimed to determine radiation attenuation parameters of Van-Erciş Rize-Ikizdere obsidians Türkiye order examine shielding potentials samples. The were calculated range 4keV-100GeV incident photon energies by Phy-X/PSD soft...

We perform a quantitative textural analysis of banding in obsidian from Big Glass Mountain (BGM), Medicine Lake Volcano, California and from Mayor Island (MI), New Zealand. The samples are compositionally homogeneous, with banding defined by variable microlite content (BGM) or vesicularity (MI). The spatial distribution of alternating light and dark bands has a 1/wavenumber power-spectral densi...

Stone-tipped weaponry was important for the survival of past peoples, and many functional non-functional factors likely influenced their design. Two that peoples considered in design stone tips are durability (whether or not a tip breaks) robusticity (how much damage is incurred upon breakage). Many have been shown experimentally to influence robusticity, including raw material. Here, we furthe...

Abstract “Lipari obsidian and Neolithic human communities in the Aeolian islands” is a project aimed at studying connection between flows on island of Lipari populations archipelago, Italy. As it well known, particular interest to trace prehistorical trading patterns; indeed, has widest distribution been found southern France, Dalmazia, Sicily mainland The outputs will give general vision both ...

The shape and three-dimensional orientation distribution of microlites are measured in obsidian from Little Glass Mountain, CA. Measurements are made from thin sections using an image series of high magnification digital micrographs taken serially through different focal depths. These measurements agree well with the theoretically predicted and experimentally measured distribution of long slend...