Devonian trilobites from the Ardennes

 

 

 

                 

                     Abandoned Quarry la Lesse at Resteigne (Belgium), witch contains the remains of the small tropical Rhenohercynian Ocean.

 

 

 

 

Over 500 million years ago they lived in the seas, nearly 300 million years long.

They are called the trilobites, hard-shelled, segmented arthropods, one of the earliest complex life forms on this planet. 

Trilobites became very diverse and peaked during the Ordovician.

 

 

In the Devonian (416-359 million years ago) life for the trilobites remains tough, some increased there armour dramatically.

At the end there number of taxa drastically diminished.

 

 

 

 

 

 

 

 

 

 

 

                                                             Line drawing copyright by Dr. Sam Gon

 

 

 

 

 

 

                         Hanonet  Formation  (upper part)     Wellin

                                 

 

                         Hanonet Formation  (upper part)      Resteigne

 

 

                         Hanonet Formation  (lower part)      Resteigne

 

                                                                                                                                  

                         Hanonet Formation  (lower part)      Couvin

 

 

 

                         Jemelle  Formation  (upper part)      Couvin

 

 

                         Jemelle Formation                               Vierves sur Virion

 

 

                         Jemelle Formation                               Vireux - Molhain

 

                 The Somnium 

 

 

 

 

 

 

                 Carboniferous trilobites from Tournai (Belgium)

 

 

 

                  

                     Carboniferous limestone, witch contains the remains of the small and closing Rhenohercynian Ocean.

 

 

 

 

By the the Carboniferous (359 million years ago) the only surviving trilobite Order was Proetida.

The number of taxa again fall dramatically after the Mid-Carboniferous, and at the end of the Permian (251 million years ago) they where extinct.

 

 

 

                                                                                                           

 

 

 

 

                                                             Line drawing copyright by Dr. Sam Gon

 

 

 

 

                         Tournaisian, Ivorian Substage     Tournai

 

 

 

 

 

 

 

 

                 Carboniferous plant fossils from Mons (Belgium)

 

 

 

                 

                     Terril material.

 

 

 

 

During the Carboniferous (359-299 million years) forest and swamps covered vast extensions of land, land-plants evolved in increasing numbers.

Swamps and forests found cover and food for many enormous scorpions, centripedes, dragonflies, cockroaches and grasshoppers.

 

 

 

 

 

 

                         Westphalian      Mons

 

 

Note: 

The Namurian (326.5-315 million years) and Westphalian (315-306.5 million years) are regional European stages.

The Namurian overlaps with the Mississipian Subsystem and the Pennsylvanian Subsystem of the Carboniferous Period.

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