Revisiting the Middle and Upper Palaeolithic archaeology of Gruta do Caldeirão (Tomar, Portugal)
Fig 12
Personal ornaments in layers Jb-K and their radiocarbon ages.
1. Perforated Aporrhais pespellacani shell. 2. Broken Littorina obtusata shell. 3. Worn-down Sparus auratus tooth (undated) and SEM image of the natural wear of the occlusal surface. 4. Eroded Semicassis saburon shell (leftmost ventral view taken after removal of the infill, showing the characteristic coarse sand/small pebble matrix of its layer of provenance). Nos. 1 and 2 are from layer Jb, nos. 3 and 4 are from layer K.