Ocher Crayon (Limonite)

Flash

Rotate the model by holding the LEFT click button and dragging with your mouse. All Flash models are shown at relative size to one another (i.e., smaller objects appear small relative to larger objects).

3DCT

Rotate the model by holding the LEFT click button and dragging with your mouse. Zoom in and out by holding the RIGHT click button and dragging your mouse up and down. Translate the model by holding both RIGHT and LEFT buttons and dragging your mouse. All 3DCT models are not shown to scale. Experiment your viewing experience by clicking the MENU button and turning various options on and off.

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PowerPoint

Download a PowerPoint slide for the 3D model of .

The free 3DCT Viewer must be installed before this slide will work in PowerPoint.

Click the link and open or save the slide to your computer. Upon opening the file, if you see a RED X, click the OPTIONS box on your security warning and select ENABLE THIS CONTENT. Then start the slide show to enable the 3D view. Rotate the model by holding the LEFT click button and dragging with your mouse. Zoom in and out by holding the RIGHT click button and dragging your mouse up and down. Translate the model by holding both RIGHT and LEFT buttons and dragging your mouse. All 3DCT models are not shown to scale. Experiment your viewing experience by clicking the MENU button and turning various options on and off.

Ancient Pigments
Date of Discovery: 1996
Discovered by: Larry Barham
Age: 250,000 years old
Location of Discovery: Twin Rivers, Zambia

Communicating with symbols

The flattened areas on these hematite (left) and limonite (right) pieces of pigment are signs of grinding or rubbing, telling us that they were held and used like chunky crayons. With pigments, our ancestors marked objects and possibly their own skin. Colors were symbols by which they identified themselves and their group.