The Lithosphere Program also known as the International Lithosphere Program (ILP) focuses to understand the beginning, transformations, dynamics, and nature of the lithosphere of planet Earth and to conducts projects of awareness worldwide. ILP emphasis on the difference between the ‘desire to understand the causes of societal needs’ for e.g. a natural disaster, a catastrophe that may change the earth’s atmosphere and geography and ‘the desire to know more about scientific destructions’ that means the amount of destruction happening on a daily basis, which could be controlled or modified to create awareness about.
To understand the lithosphere programs, you first must understand what a lithosphere is and what it consists of. The lithosphere is the hard, outermost part of the earth. The layers of earth are divided into the outer crust, the middle mantle and the inner most core. The lithosphere surrounds the surface of the earth and is responsible for the movement of the tectonic plates. It comprises of the continents and extends up to 100 kilometers in length, all around the planet earth in a circle.
Scientists monitor the lithosphere layer because this layer is under constant motion, but it moves slow and steady. These movements are responsible for the movements of the tectonic plates. Tectonic plates are better known as fracture plates. It is believed that the movement occurs due to the generation of the heat from the mantle to the crust. The vast difference in the temperatures of the mantle and the crust cause these numerous fractures to occur. However, some suggest it is due to an external impact on the crust itself. The movement of these plates, or rubbing of these plates against each other, produces friction and is the cause of earthquakes.
The immediate inner layer to the crust and also a part of lithosphere is the Asthnosphere. The geologist Joseph Barrel suggested a hypothesis on the basis of the pulling force (gravity) of the Earth that since lithosphere is the outermost layer and farthest from the centre of the earth it must produce minimum gravity and must be stronger and more resistant than the weaker immediate inner layer that has greater effects of gravitational force. Another Geologist Reginald Aldworth Daly researched on these further to create awareness
The reason scientists monitor this layer, is to keep track of any kind of activity that might help in the future to predict earthquakes and tsunamis. The lithosphere has been classified into Oceanic Lithosphere and Continental Lithosphere. Oceanic lithosphere is the part that is present on the basin of oceans. The Continental lithosphere however comprises of sedimentary rocks that form continents.
Important reads and links:
Wiley.com paper
The International Lithosphere Program directory