DNA AND PROTEIN RECOVERY FROM WASHED EXPERIMENTAL STONE TOOLS*

Traces of protein and DNA are preserved on stone tools used to process animals. Previous research documents the identification of protein residues from tools sonicated in 5% ammonium hydroxide, but it remains untested whether the same treatment yields useable DNA. In this study we report both DNA and protein recovery using 5% ammonium hydroxide from residues on stone tools. We extracted 13‐year‐old residues from experimentally manufactured stone tools used to butcher a single animal. We also show that surface washing procedures typically used to curate stone tools remove only a small fraction of the DNA and protein deposited during animal butchery.     

COLD NEUTRON PROMPT GAMMA ACTIVATION ANALYSIS—A NON‐DESTRUCTIVE METHOD FOR CHARACTERIZATION OF HIGH SILICA CONTENT CHIPPED STONE TOOLS AND RAW MATERIALS*

Recently, several archaeometrical projects have been started on the prehistoric collection of the Hungarian National Museum. Among the analytical methods applied, non‐destructive prompt gamma activation analysis has a special importance. We have also tested the potential of this method on chipped stone tools, with the aim of determining their exact provenance. On the basis of major and trace element components, characterizations of stone tools and their raw materials—silicites (flint, chert, radiolarite and hornstone) as well as volcanites (felsitic porphyry and obsidian)—were performed. We discuss some important results concerning each group, as case studies. Compiling the data set of different PGAA analysis series, compositions of 110 samples are reported, including 76 archaeological pieces. In the future, we plan to extend the number of investigated objects in each class.     

THE ROMANESQUE FRIEZE AT LINCOLN CATHEDRAL (ENGLAND)—PRIMARY OR SECONDARY INSERTION? MAGNETIC CONSIDERATIONS*

The current debate about the age of the Romanesque frieze of Lincoln Cathedral weighs archaeological evidence against art history. On the one hand, the panels appear to be an integral part of the original Norman structure built by the first bishop (AD 1072–92). However, on grounds of style and artistic comparisons, art historians argue for a later installation during the restoration of AD 1141–6. In order to determine when the panels were stabilized in the cathedral, we used a new method that measures their degree of remagnetization by the earth's magnetic field since they were quarried. The longer that masonry remains stabilized in a given orientation, the greater its viscous remagnetization. Viscous remanent magnetization dating has previously been successful with this particular type of limestone masonry. Our results lend support to the view that the panels were installed in the early 1140s.     

OLDOWAN RAW MATERIAL PROCUREMENT AND USE: EVIDENCE FROM THE KOOBI FORA FORMATION*

Raw material availability has been shown to be a major factor affecting the material culture of Oldowan tool users. Studies of artefact provenance often focus on site‐specific raw material availability. Here, we use data from primary and secondary sources of raw material to develop a model of basin‐scale stone availability in the eastern Turkana Basin, during the KBS and Okote Members of the Koobi Fora Formation. ED‐XRF was used as a method of characterizing raw material sources and artefacts using trace elements. This model is applied to the site of FxJj 50 to investigate transport and discard patterns.     

In the Steps of William the Conqueror: Neutron Activation Analysis of Caen Stone*

Quarries in the Bathonian stone formation surrounding Caen produced high‐quality limestone for medieval churches in northern France and southern England and for their sculptural decoration. To investigate compositional differences among proximate stone sources, 103 samples collected from five separate quarries were analysed by NAA. The results show Caen stone to be essentially pure calcite and relatively homogeneous, but distinction among quarries is possible by discriminant analysis. Comparing compositions of quarry samples with data in the Brookhaven Limestone Database identified the origin of stone used in masonry and sculpture at Saint‐Étienne and La Trinité, Caen, and in several museum objects.