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1.
Acid rain
Subjects
Rain and rainfall
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2.
Acis soils
Subjects
Soils
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3.
Acritarchs
Subjects
FossilsMicroorganisms
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4.
Age of the Earth
Subjects
-
5.
Agricultural meteorology
Subjects
Meteorology
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6.
Alabaster
Subjects
-
7.
Albitite
Subjects
Igneous rocks
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8.
Alexandrite
Subjects
-
9.
Alkalic igneous rocks
Subjects
Igneous rocks
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10.
Alluvial fans
Subjects
-
11.
Alluvial streams
Subjects
Rivers
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12.
Alluvium
Subjects
Sediments (Geology)
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13.
Altitudes
Subjects
Geospatial dataPhysical geography
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14.
Amber
Subjects
Precious stones
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15.
Ammonoidea
Subjects
Fossil cephalopoda, Fossil
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16.
Amphiboles
Subjects
Silicates
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17.
Anàlisi de roques
Subjects
Analytical geochemistry
-
18.
Analytical geochemistry
Subjects
GeochemistryAnalytical chemistry
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19.
Andesite
Subjects
Igneous rocks
-
20.
Anemomèter
Subjects
Meteorological instruments
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21.
Animal tracks
Subjects
-
22.
Anthropocene
Subjects
Quaternary
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23.
Aplite
Subjects
Igneous rocks
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24.
Aproz (Trademark)
Subjects
Trademarks