29 September, 2006

short note: strange materials??

I do not know about those materials. Does anyone have any ideas?

Very recently I found those materials from a stone tool (andesite) of an archaeological site (middle to late Jomon) in Japan. I do not think they are ancient starch. But what are these?


Photos (no-polarlized & polarlized): "strange materials"
scale bar = 10 μm, magnification = 400x
Copyright by ayako



E.g. Ancient starch in Japan (not identified yet)

scale bar = 10 μm, magnification = 400x
Copyright by ayako

1 comment:

  1. After uploading this note, some archaeologists suggested this object is its some kind of "spherulite".

    This means 'discrete arrangements of fine, usually fibrous
    crystallites arranged in a radial or concentric pattern.' (Canti 1997*)

    *M. G. Canti 1997. An Investigation of Microscopic Calcareous Spherulites from Herbivore Dungs. Journal of Archaeological Science 24: 219-231.

    ReplyDelete