Topps has created some of the hobbyâs most iconic football cards, including almost all of those that would be on the list of the most valuable and popular ever issued. From 1956-63 Topps enjoyed a virtual football card monopoly (with the exception of 1961).
1 Volcanic mountains-Mountains that are caused by volcanic activity are called volcanic mountains. 2  There are two main types of volcanic mountains: volcanoes and dome mountains. 3  Volcanoes are formed when magma erupts all the way to the surface of the Earth. 4  The magma will harden on the Earth's surface, forming a mountain.
About. Magma is liquid rock in between the crust and the mantle, formed when part of the lower crust or upper mantle melts. When magma travels up through a volcanoâs vent, bubbles of gas also appear. All the gas builds up pressure, which causes the magma to explode out of the volcano. Many volcanoes are mountains, made up of layers of lava and ash. 2  Many volcanoes have several vents â a main one, and secondary ones that branch off the main vent. 3  The volcanoâs main vent goes all the way down to the layer of magma in between the Earthâs crust and mantle.