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Glauconitic fecal pellets with a
phosphatic rind. The bottle-green
color and the granular texture is a
strong indicator for glauconite;
the pleochroic wood-brown rind
indicates the presence of phosphate.
Digested and excreted phosphatic
components from the fecal pellets
diffused outwards and precipitated at
the contact with the seawater as
Fe-phosphate

Bright field

 

Dark field

Texture:

Texture of the grains, ecc.Well sorted, well rounded coarse-grained pellets. This is not really a natural sand because the grains were concentrated by washing and sieving from a muddy box corer sample

Sample number

Collector

Date of sampling

heubeck0025

Christoph Heubeck, Institut für Geologische Wissenschaften, FU Berlin

dec. 2001

 

 

 

Comments:

Further comments on the sand, depositional history, ecc.