What kind of rock is marble?

sedimentary rock

smelted sand

metamorphosed limestone

congealed lava under a volcano

Marble is a metamorphic rock. It is formed deep under the Earth surface, under high pressure and temperature between 500 and 700°C. Under such conditions calcite recrystallises and limestone is transformed into marble.

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USGS wikipedia → Marble

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Republic of Ireland

89%

Pakistan

13%

83%

Lithuania

83%

Italy

13%

77%

India

17%

70%

167

Spain

23%

70%

Austria

15%

64%

12%

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23%

62%

739

Australia

22%

62%

the Philippines

25%

62%

Unknown

19%

14%

61%

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21%

11%

59%

482

the United Kingdom

17%

11%

57%

13%

263

Canada

23%

10%

56%

Greece

22%

56%

15%

France

30%

15%

55%

Poland

21%

10%

53%

14%

14344

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25%

52%

19%

Ukraine

15%

13%

51%

17%

the Netherlands

21%

15%

51%

Which desert has this famous "eye"?

Which of the following European mountain ranges will rise the most in the next century?

Carpathian Mountains

Alps

Pyrenees

Scandinavian Mountains

This kind of tilted forest is a common sight in subarctic taiga. What is this phenomenon caused by?

What rock is this?