Tag: subduction
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…
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…
Andesitis: what is it?
Andesites are part of the large family of volcanic rocks. Of color Light gray that can go to black, andesite has a microlitic structure, which means that the majority of…
Accretion prism: what is it?
A prism ofaccretion represents a structure of tectonic origin linked to the accumulation of sediments at the level of a subduction. Scaling and sediment build-up In subduction zones, the oceanic…
How a continent opened up influences the location of future subduction zones
A new study provides a better understanding of where and how subduction zones are initiated, a major stage in the Wilson cycle. It appears that the tectonic and magmatic heritage…
How does a mud volcano work?
When we hear the word “volcano” we usually think of lava and magma. But there is another type of volcanism, which can be just as devastating. These are the mud…
This map betrays the magnetic signatures of the telluric forces that shaped the Earth
The map of the Earth’s magnetic field has been enriched with a new model making it possible to better understand the thermal state of the Earth’s crust, to perceive the…