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It is important to know the terms of the landforms on the Earth. A shield volcano is a wide gently sloping mountain made of a hardened layers of low silica lava.
The different layers of a volcano are made from the lava and ash produced by the volcano. Some volcanoes have different thicknesses of layers or only one type of layer depending on the kind of eruption and how much ash it produces.
Shield volcano
Shield volcano
I'm pretty sure they're made up by years and layers of hardened lava make by volcanoes erupting.
It is a lava plateau.
Tall cone shaped mountains that have alternate layers of hardened lava and ash.
When lava erupts, it cools and hardens. After long periods of this happening and cooling in layers on top of all the other cooled lava, a mountain of hardened lava rises out of the water and to the surface. This rising mountain soon will become a volcanic island.
they are made of volcanic rock and lava ( hardened of course!)
Igneous rock is made of cooled and hardened lava or magma.
Hardened lava is considered igneous rock, composed of minerals.
lava