 Numerous archeological sites in the northern part of France along the channel coast show a very strong Saxon and Anglo-Saxon influence in the early Middle Ages.The territory of Ledringhem was part of the microcontinent Avalonia in the Paleozoic era.Euramerica, also known as Laurussia, was a minor supercontinent created in the Devonian as the result of a collision between the Laurentian, Baltica, and Avalonia cratons.