These islands are volcanic arc formations due to the convergent boundary where the pacific plates subducts under these Indo-Australian plates, so the subducting pacific plate created the Kermadec ridge that runs from north island of New Zealand to Tonga northeast wards. There are several volcanoes that rise from this zone of the sea bed.
When granite is exposed to elements such as wind and water, it weathers and erodes and the particles are deposited. Pressure causes these and other particles to form sandstone at Earth's surface. ... Increased heat and pressure will change the sedimentary rock into metamorphic rock.
Because some continents are above two plates, the continents move when the plates do. The movement of tectonic plates can cause earthquakes and volcanoes. Understanding this movement can help predict where earthquakes will take place. ... This forces apart pieces of the Earth's surface in a violent earthquake.
The pressure exerted by the air is said to be the atmospheric pressure and it acts as force over the surface of the earth. As pulls exerted by the gravity of the earth.
Commonly measured by the barometer, a device used to measure that atmosphere when values are measured or taken from the average mean sea levels.
Thus its defined be as force per unit area as air has weight. The development of high and low pressure is measured at the sea level which is 1013 pascal.
