Presentation on theme: "Field Geosciences Teaching Module: Geoparks and Geosites Geopark Naturtejo Meseta Meridional Portas de Almourão: What is the sustainability of a Project."— Presentation transcript:
Field Geosciences Teaching Module: Geoparks and Geosites Geopark Naturtejo Meseta Meridional Portas de Almourão: What is the sustainability of a Project to build a dam in this geosite?
Geological Map of Naturtejo Global Geopark Portas de Almourão
Geodynamic evolution of the landscape 500 million years ago there was an ocean where sand and clay sediments have been deposited 300 million years ago the collision of tectonic plates lead to the formation of a mountain belt by deformation of the sedimentary rocks previously formed
Geodynamic evolution of the landscape About 2 million years ago the Ocreza river incised its valley across Ródão Syncline
Albarda Fold Skolithos trace fossils Ripple marks What is the meaning of the name “Albarda” for the fold?
Roman Gold Mine How was the gold mined? Where did the gold come from?
Landslide and scree deposits The landslides and scree deposits along the valley slopes are the result of the erosion of the quartzite crests in very steep slopes
What can be the importance of building a dam in this place?