What is karst?

a kind of physical decomposition
a kind of chemical decomposition
a kind of biological decomposition
none of the above
Karst is a topography formed from the dissolution of soluble rocks such as limestone, dolomite, and gypsum. It is characterized by underground drainage systems with sinkholes and caves. It has also been documented for more weathering-resistant rocks, such as quartzite, given the right conditions.
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reach: rather globalcaveschemistrygeographygeologymineralsnaturephysicsrocks

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a kind of physical decomposition
a kind of chemical decomposition
a kind of biological decomposition
none of the above
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flagItaly
3%
82%
6%
6%
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flagRomania
0%
70%
10%
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flagNigeria
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15%
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flagAustralia
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11%
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48%
17%
19%
400
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16%
47%
25%
9%
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flagMalaysia
15%
46%
9%
28%
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flagthe United Kingdom
17%
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flagUkraine
9%
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31%
11%
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flagPoland
25%
44%
13%
16%
19381
flagthe United States
18%
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14%
21%
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flagAustria
20%
44%
11%
22%
54
flagPakistan
13%
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19%
23%
51
flagthe Netherlands
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43%
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18%
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flagGreece
28%
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16%
11%
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flagUnknown
29%
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12%
16%
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15%
34%
31%
18%
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flagCanada
15%
34%
15%
34%
32
flagRepublic of Ireland
25%
29%
12%
33%
24
flagSwitzerland
19%
22%
38%
19%
31