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Trilobites (meaning "three lobes") are a well-known fossil group of extinct marine arthropods that form the class Trilobita. Trilobites form one of the earliest known groups of arthropods. The first appearance of trilobites in the fossil record defines the base of the Atdabanian stage of the Early Cambrian period (526 million years ago, and they flourished throughout the lower Paleozoic era before beginning a drawn-out decline to extinction when, during the Devonian, almost all trilobite orders, with the sole exception of Proetida, died out. Trilobites finally disappeared in the mass extinction at the end of the Permian about 250 million years ago. The trilobites were among the most successful of all early animals, roaming the oceans for over 270 million years.

 
 


1. QUARRY
The Devonian is a geologic period and system of the Paleozoic. You then see the entrance of a quarry and how it could go very deep.
  2. TRILOBITE IN THE QUARRY
Example of a trilobite found in one layer of the quarry. It needs to be extracted.
  3. ROCKS COLLECTED FROM A QUARRY
Examples of rocks extracted from the quarries. It now needs to
be carefully prepared
  4. INSIDE THE ROCK
The rock is cut and we are able to see some evidences of trilobites inside. This now has to be extracted
out of the rock.
             
     
5. EVIDENCE OF TRILOBITE INSIDE
Rough trilobites to be extracted.
  6. ROUGH TRILOBITE
You can see the track (trace) of positive-negative faces of the trilobite.
  7. GLUING THE ROCK
We now need to glue the two pieces back together in order to prepare the trilobites.
  8. WORKSHOP
Typical local workshop where trilobites are prepared in the South of Morocco.
             
     
9. BEGINING OF THE TRILOBITE
Prepartion needs to be fine and precise, the work needs a magnifier. A trilobite might need from 10 to 100+ hours of work.
  10. TOOLS
Depending on the work, if the trilobite is deep inside the rock we need a precutor with strong pressure of up to 8 bar.
  11. PRECUTOR
When the trilobite is near to the surface it is another precutor that's needed with pressure between 2 and 3 bar.
  12. WORKER in the WORKSHOP
Before the development of proper modern tools and materials, trilobites were prepared with basic materials.
             
       
    13. FINE PREPARATION
The hands of a worker with a
modern precutor.
  14. FINAL RESULT
A very nice cornuproetus prepared
and ready for sell.
   
 
 



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