A forcible overthrow of a government or social order, in favor of a new system
Humans created it ~ nixkorskittles :D
The rocks can be classified into three different classes: igneous, sedimentary and metamorphic. The igneous rock can further divided into extrusive and intrusive. The sedimentary rock can be further divided into organic, chemical and clastic. The metamorphic rock can be further divided into foliated and non foliated.
The obsidian is extrusive igneous rock.
The granite is intrusive igneous rock.
The conglomerate is clastic sedimentary rock.
The evaporite is chemical sedimentary rock.
The coal is organic sedimentary rock.
The marble is metamorphic rock.
The answer is; A
Usually, the oceanic plate is heavier than the continental plate. This is because the oceanic plate is ‘wet’ from the percolated oceanic water in its crust. Therefore, it is submerged by the continental plate, As they collide. the crust (especially the continental plate) folds hence casing uplifting and formation of fold mountains such as the Himalayas.