large Mesozoic continent, which included the land masses that today correspond to North America, Eurasia and Greenland. It resulted from the breaking-up of Pangea, which was divided in two large continents: Laurasia in the northern hemisphere and Gondwana in the southern hemisphere.


large Paleozoic continent, created by the collision of Paleolaurentia and Baltica. During the Hercinian orogeny episode, this continent increases its size with the addition of the surfaced lands that prefigure Southern Europe.


molten matter expelled by volcanoes. After cooling down, it becomes solid, resulting in volcanic rocks. 


Levallois method

flaking technique that produces flakes, points or blades of predetermined shape from a prepared core.





general concept, representing all the stone objects used by prehistoric man.


solid outer layer of the Earth, made up by rocks and minerals. It is tens of kilometres thick, being thicker in continents than in oceans.

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