• Publications
  • Influence
The first in situ Raman spectroscopic study of San rock art in South Africa: procedures and preliminary results
Southern Africa has a rich heritage of hunter-gatherer, herder and farmer rock art traditions made by using both painted and engraved techniques. Until now, there have been only a handful of studiesExpand
Experimental heat treatment of silcrete implies analogical reasoning in the Middle Stone Age.
TLDR
Results show that the volume expansion during the thermally induced α- to β-quartz phase transformation and the volume contraction during cooling play a major role in the heat treatment of silcrete. Expand
The Vibrational Spectra and Decomposition ofα-Calcium Nitride (α-Ca3N2) and Magnesium Nitride (Mg3N2)
Abstract α -Ca 3 N 2 has been characterized by X-ray powder diffraction and its structure confirmed by a crystal structure refinement with the Rietveld method. Ca 3 N 2 and the isostructural Mg 3 N 2Expand
Infrared reflectance spectroscopy as an analytical technique for the study of residues on stone tools: potential and challenges
FTIR (Fourier transform infrared) spectroscopy is a non-destructive analytical method that has been used successfully to analyse both inorganic and organic archaeological material. Using a microscopeExpand
Initial micromorphological results from Liang Bua, Flores (Indonesia): Site formation processes and hominin activities at the type locality of Homo floresiensis
Liang Bua, a karstic cave located on the island of Flores in eastern Indonesia, is best known for yielding the holotype of the diminutive hominin Homo floresiensis from Late Pleistocene sediments.Expand
Hyraceum, the fossilized metabolic product of rock hyraxes (Procavia capensis), shows GABA-benzodiazepine receptor affinity
TLDR
Tests of hyraceum samples collected at various geographical locations in South Africa and assayed for GABA-benzodiazepine receptor affinity show a complex mixture of constituents, with no feature being a distinguishing pattern for all four active samples. Expand
Rock hyraces: a cause of San rock art deterioration?
San rock art sites are found throughout southern Africa, many showing signs of deterioration. In order to conserve this invaluable heritage, a long-term multidisciplinary project has been launched toExpand
Re‐dating of Chinese celadon shards excavated on Mapungubwe Hill, a 13th century Iron Age site in South Africa, using Raman spectroscopy, XRF and XRD
Chinese celadon shards of the Longquan type, believed to date from the Southern Song dynasty (1127–1279 AD), were excavated in 1934 on Mapungubwe Hill, a 13th century Iron Age site in the LimpopoExpand
Deterioration of San rock art : new findings, new challenges
The heritage of San rock art in southern Africa is globally acknowledged, and was one of the primary reasons for the successful nomination of the uKhahlamba/ Drakensberg Park in South Africa as aExpand
...
1
2
3
4
5
...