Tag: sediment
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…
Palynology: what is it?
Palynology owes its name to the botanists Hyde and Williams who, in 1944, called the discipline that studied pollen and spores “dust study”, from the Greek palunein (sprinkle, sprinkle). Above,…
Follow the meanders of the longest underwater river in the world
Like our rivers, the underwater world also has its system of channels, in which sediment-laden fluids flow. A new mission off the Canadian coast reveals the morphology of the longest…
Scientists have discovered that the huge Amazon basin is sensitive to rapid climate change
New findings upend assumptions about how the landscape of the Amazon Basin was shaped. It could have gone from erosion to construction in just a few tens of thousands of…
Evolution of life on Earth and supernovae would be closely related
In their quest to understand the origins of life, scientists wonder in particular about the conditions conducive to its emergence. Many hypotheses have already been formulated. And today, researchers are…
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…
When the winds of Mars allow you to know your subsoil
The InSight mission was sent to Mars in 2018 with a very specific objective: to probe the interior of the Red Planet. And as surprising as it may seem, it…
The winds of Mars can detect what is beneath its surface
The InSight mission was sent to Mars in 2018 with a very specific objective: to probe the interior of the Red Planet. And as surprising as it may seem, it…
The Digne ammonite slab: why such a large concentration of fossils?
Emblematic site of the Haute-Provence geological nature reserve, the Dalle aux ammonites de Digne has an impressive concentration of fossils. In what environment did these Jurassic marine animals settle? Is…