Tag: tectonic plates
Slab: what is it?
“Slab” is the term used to refer to the sinking plate in the context of subduction. A subduction zone is defined by the convergence of two tectonic plates, with an…
Passive continental margin: what is it?
“Continental margin” is the term used to define the transition zone between a continental crust and an oceanic crust. There are two types of continental margins: the active margin and…
How is a new ocean born?
On Earth, no ocean is more than 200 million years old, testifying to the great cyclicity of tectonic processes. Very regularly, some oceans close while others open up. But how…
Active continental margin: what is it?
“Continental margin” is the term used to define the transition zone between a continental crust and an oceanic crust. There are two types of continental margins: active margins and passive…
How were the Himalayas formed?
Like the Alps, the Himalayas are a mountain range resulting from the collision of two continents: India and Eurasia. You will also be interested [EN VIDÉO] A billion years summarized…
What is the composition of the oceanic crust?
The oceanic crust is one of the two components of the earth’s crust. Very different from continental crust, it is continuously formed at mid-ocean ridges. However, its composition is very…
Protolith: what is it?
Some geological processes, such as metamorphismmetasomatism or chemical weathering, lead to the transformation of all types of rocks, designated as protoliths, into rocks of a different nature. The protolith therefore…
These active faults that mark out France
The French territory inherits a long and complex tectonic history. Evidenced by the many faults that incise our basement. Many are still active. To understand them and assess the seismic…
Huge crustal intrusion could cause mega-earthquakes off Japan
Understanding the origin and the processes responsible for Japan’s strong seismicity is essential to protect the inhabitants of this region of the world. In this context, the structure and composition…
Huge intrusion into ocean crust could cause mega-earthquakes off Japan
Understanding the origin and the processes responsible for Japan’s strong seismicity is essential to protect the inhabitants of this region of the world. In this context, the structure and composition…