Iron Oxide (Material Keyword)

1-3 (3 Records)

All Kenya Ochre Sources Sampled (2012)
DATASET Uploaded by: Andrew Zipkin

Ochre mineral pigment sources in the Kenya Rift Valley Sampled in 2012 for Zipkin's dissertation research project. Each entry represents a sample of ochre collected. Each sample has a unique identification code beginning with the prefic "KEN". Multiple samples were often collected from the same source in order to assess intra-source chemical variability. Source names are associated with each waypoint.

Elemental composition of Kenya 2012 ochre sources (2012)
DATASET Uploaded by: Andrew Zipkin

The results of each ablation performed on an ochre sample are presented in this table with elements in parts per million and oxides in percent weight, as measured by Homogenized Ochre Chip Laser Ablation-Inductively Coupled Plasma Mass Spectrometry (HOC LA-ICPMS). *Mean FeO as percent weight Fe2O3+FeO was determined by Electron Microprobe Analysis of each ochre chip and was used as an internal standard for LA-ICPMS data reduction. Elements labeled in red should be excluded from statistical...

Ochre Use in Middle Stone Age East and Central Africa
PROJECT The George Washington University. Andrew Zipkin. Alison Brooks.

Symbolism, including language, is widely viewed as an essential element of modern human behavior. Documenting the evolutionary origins of such behavior, however, has proven difficult. Ochre pigments (iron oxides) form a major part of the evidence used to interpret when humans began communicating through symbols. Excavations at Olorgesailie, Kenya; Karonga, Malawi; and Twin Rivers, Zambia have yielded ochre artifacts that may indicate very early occurrences of symbolism. Yet mineral pigments may...