Metamorphic rocks

Sedimentary and magmatic rocks, when tectonic movements occur, can be dragged to high depths and find themselves at extreme temperature and pressure conditions, which transform their crystal structure. This process is called metamorphic process and transforms sedimentary and magmatic rocks into metamorphic ones. For example, carbonate rocks that are subject to the metamorphic process form marble. Sandstones and clay transform into gneiss rocks.
Can rocks transform?
The Earth’s crust continuously evolves because rock transformation processes are constantly active. Superficial rocks (sedimentary and magmatic) are transported into soil depth and transformed into metamorphic rocks. If high temperatures are reached, rocks melt and transform into magma. When the magma cools down and goes back into solid state, magmatic rocks are formed. Deep rocks can be brought back to the surface, eroded and form fragments that will represent the deposits of sedimentary rocks.

Special reports

  • 16 July 2013

    Van Allen belts

    ...and the spectacular phenomenon of polar auroras

    5 January 2005

    Tsunami in the Maldives

    On the 26th December 2004, an earthquake...

    8 November 2013

    Magnets and superconductors

    Which one of us has not played at attracting small pieces of iron with a magnet?

  • 10 January 2012

    Shale gas

    Unconventional gas: shale gas

    6 September 2009

    Oil fields beneath the ice

    Con la graduale scomparsa del ghiaccio marino in seguito al...

    13 May 2013

    Small steps, great footprints

    Have you ever wondered how much space is taken up by an apple or a steak?...

  • 15 September 2008

    Natural gas

    Natural gas has been the last fossil fuel to assert itself on a global scale...

    18 January 2016

    Ten years of oil demand

    Eni has recently published the 14th edition of the 2015 World Oil and Gas Review...

    30 April 2019

    Urban woods

    When walking along a tree-lined avenue in a crowded and traffic-congested city, wrapped up in our daily commitments, we do…

From the Multimedia section

Facts