Figure 8-9. Zone of secondary aragonite (S) between layers of primary aragonite (P). Note downward-pointing terminations (arrows) of aragonite needles in botryoids of secondary aragonite; needles of primary aragonite almost always point upward. Another image in this atlas shows another example of secondary aragonite.
     Photomicrograph was taken in plane-polarized light; field of view is 2.1 mm wide. Drotsky's Cave, Botswana; Stalagmite BDS3; thin section B02; sample collected by Drs. George A. Brook and John Cooke.
   
  Speleothem Image
   
   
  Back to the Table of Contents of the Atlas of Speleothem Microfabrics.