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Rocks

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Across
4.This is a sedimentary rock composed of calcium carbonate
6.Layer between the earths crust and core
7.This rock type can both formed from others under intense heat and/or compression.
9.Common cause of chemical weathering.
11.Formed when magma reaches the surface
13.Roman city that was buried by Mount Vesuvius
15.Light igneous stone which is very porous
16.Terrifying volcano that erupted in 1883.
19.Rock formed when magma cools and solidifies
20.Gas released from volcanoes.
21.This activity is a good indication of what is happening beneath the surface
Down
1.The boundary of these plates is where volcanoes are commonly found
2.This rock is the weakest type and is formed slowly in layers
3.Destructive force caused when an ash cloud collapses.
5.Useful metamorphic rock used for roofing tiles
8.Igneous rock with large crystals commonly formed underground
10.Black glass rock formed when lava cools very quickly.
12.Massive wave which can be a devastating after effect of an earthquake.
14.Process which slowly breaks down rocks over time.
17.You won't find these in igneous rocks
18.This is a metamorphic rock composed of calcium carbonate

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