GEOTECHNOLOGIEN Rätselbild November 2003

What is shown here?

R tselbild November 2003 USGS
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In the monthly GEOTECHNOLOGIEN puzzle image we present a section of a picture and leave it to your creativity or your knowledge to find out what is behind it ...

Here is the November picture: What is it? A fuzzy sediment sample under the microscope? The eye in the eye of a hurricane? A dirty glass pane? Or something completely different?

The solution can be found here

(, 21.11.2003 - DLO)