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K-bentonite (1)
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metamorphic rocks
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amphibolites (1)
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gneisses
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impactites (1)
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metabasalt (1)
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metaplutonic rocks (1)
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metasedimentary rocks
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metasomatic rocks
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skarn (3)
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ophiolite (2)
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meteorites
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meteorites
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Northwest Africa Meteorites (2)
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stony meteorites
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chondrites
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carbonaceous chondrites
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Allende Meteorite (8)
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minerals
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alloys
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carbides (1)
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taenite (1)
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halides
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fluorides
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K-bentonite (1)
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minerals (2)
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native elements
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oxides
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phosphates
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monazite (3)
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silicates
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aluminosilicates
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chain silicates
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amphibole group
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clinoamphibole
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actinolite (1)
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arfvedsonite (2)
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hornblende (1)
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-
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astrophyllite (1)
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pyroxene group
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clinopyroxene
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aegirine (2)
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diopside (2)
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-
orthopyroxene
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enstatite (2)
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ferrosilite (1)
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-
-
wollastonite group
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pectolite (2)
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wollastonite (1)
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-
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framework silicates
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feldspar group
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alkali feldspar
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K-feldspar (1)
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microcline (1)
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plagioclase
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albite (2)
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anorthite (1)
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-
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nepheline group
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nepheline (2)
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silica minerals
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coesite (1)
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quartz (4)
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stishovite (1)
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sodalite group
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sodalite (1)
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-
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orthosilicates
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nesosilicates
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britholite group
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britholite (1)
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garnet group
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olivine group
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olivine (4)
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titanite group
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zircon group
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coffinite (1)
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zircon (24)
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-
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sorosilicates
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epidote group
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clinozoisite (1)
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innelite (1)
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melilite group
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akermanite (1)
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gehlenite (3)
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-
-
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ring silicates
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beryl (3)
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cordierite (1)
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eudialyte (1)
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milarite group
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-
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sheet silicates
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clay minerals
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smectite (1)
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illite (4)
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mica group
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biotite (3)
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palygorskite (1)
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-
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sulfates
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alunite (3)
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sulfides
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pyrrhotite (2)
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troilite (1)
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sulfosalts (1)
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tungstates
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scheelite (2)
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vanadates
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carnotite (1)
-
-
-
Primary terms
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absolute age (39)
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Africa
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East Africa
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Tanzania (1)
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Southern Africa
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Asia
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Altai Mountains
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Altai Russian Federation
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Central Asia
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Far East
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China
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Da Hinggan Ling (1)
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Xizang China
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Japan (1)
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Indian Peninsula
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asteroids (1)
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Atlantic Ocean
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Australasia
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bacteria (1)
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Canada
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Newfoundland and Labrador
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Newfoundland
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Nunavut
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Western Canada
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Alberta (1)
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Northwest Territories
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Ekati Mine (1)
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Saskatchewan (1)
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-
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carbon
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C-13/C-12 (13)
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C-14 (1)
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organic carbon (1)
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Caribbean region
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West Indies
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Cenozoic
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Quaternary
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Holocene
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Pleistocene (2)
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Tertiary
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lower Tertiary (1)
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Neogene
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Miocene
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lower Miocene
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Waitemata Group (1)
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middle Miocene (2)
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Pliocene (4)
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Paleogene
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Dongying Formation (1)
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Eocene (6)
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Oligocene (2)
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Shahejie Formation (2)
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Central America
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Belize (3)
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Guatemala
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Motagua Fault (1)
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Panama (2)
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chemical analysis (1)
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Chordata
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Vertebrata (1)
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clay mineralogy (1)
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climate change (2)
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core (2)
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Europe
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Armenia
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Bashkortostan Russian Federation
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Caucasus
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Germany
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Italy
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Variscides (1)
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Sweden
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United Kingdom
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Scotland
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Highland region Scotland
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Inverness-shire Scotland
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Isle of Skye (1)
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-
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-
-
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faults (21)
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Graptolithina (1)
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ground water (4)
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heat flow (2)
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hydrogen
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D/H (3)
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hydrogeology (1)
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ichnofossils
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Skolithos (1)
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igneous rocks
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carbonatites (2)
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feldspathoid rocks (2)
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kimberlite (1)
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plutonic rocks
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diorites
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diorite porphyry (1)
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quartz diorites (2)
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tonalite (1)
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trondhjemite (2)
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gabbros (3)
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granites
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alkali granites (1)
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A-type granites (1)
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biotite granite (1)
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I-type granites (2)
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leucogranite (2)
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monzogranite (2)
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granodiorites
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granodiorite porphyry (1)
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monzodiorite (1)
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monzonites (1)
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pegmatite (2)
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syenites
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albitite (1)
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alkali syenites (1)
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nepheline syenite
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foyaite (1)
-
-
-
ultramafics
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peridotites
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harzburgite (1)
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pyroxenite (1)
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urtite (1)
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porphyry (3)
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volcanic rocks
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adakites (2)
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andesites (2)
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basalts
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mid-ocean ridge basalts (1)
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shoshonite (1)
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phonolites (1)
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pyroclastics
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scoria (1)
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tuff (1)
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trachytes (1)
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inclusions
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fluid inclusions (14)
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interplanetary space (1)
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intrusions (19)
-
Invertebrata
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Arthropoda
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Mandibulata
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Crustacea
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Ostracoda (1)
-
-
Insecta
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Pterygota
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Palaeoptera
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Odonata (1)
-
-
-
-
-
Trilobitomorpha
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Trilobita (2)
-
-
-
Brachiopoda (2)
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Cnidaria
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Anthozoa (3)
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Hydrozoa (1)
-
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Mollusca
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Bivalvia (1)
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Gastropoda (1)
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Porifera (3)
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Protista
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Foraminifera
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Fusulinina (1)
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Radiolaria (2)
-
-
-
isotopes
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radioactive isotopes
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Ar-40/Ar-39 (1)
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C-14 (1)
-
Nd-144/Nd-142 (1)
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Pb-206/Pb-204 (3)
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Pb-207/Pb-204 (3)
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Pb-208/Pb-204 (2)
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Rb-87/Sr-86 (2)
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Sm-147/Nd-144 (3)
-
-
stable isotopes
-
Ar-40/Ar-39 (1)
-
C-13/C-12 (13)
-
D/H (3)
-
Hf-177/Hf-176 (6)
-
N-15/N-14 (1)
-
Nd-144/Nd-142 (1)
-
Nd-144/Nd-143 (12)
-
O-18/O-16 (17)
-
Pb-206/Pb-204 (3)
-
Pb-207/Pb-204 (3)
-
Pb-208/Pb-204 (2)
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Rb-87/Sr-86 (2)
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S-34/S-32 (5)
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Sm-147/Nd-144 (3)
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Sr-87/Sr-86 (19)
-
-
-
lava (2)
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lineation (2)
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magmas (9)
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mantle (16)
-
Mesozoic
-
Cretaceous
-
Comanchean
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Edwards Formation (1)
-
-
Lower Cretaceous
-
Aptian (2)
-
Edwards Formation (1)
-
-
Upper Cretaceous
-
Black Creek Formation (1)
-
-
-
Jurassic
-
Arapien Shale (1)
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Carmel Formation (1)
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Lower Jurassic (1)
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Twin Creek Limestone (1)
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Upper Jurassic
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Tithonian (1)
-
-
-
Triassic
-
Middle Triassic (3)
-
Moenkopi Formation (1)
-
Upper Triassic
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Norian (1)
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Yanchang Formation (1)
-
-
-
Vaca Muerta Formation (1)
-
-
metal ores
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arsenic ores (1)
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copper ores (2)
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gold ores (6)
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lead ores (1)
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lead-zinc deposits (1)
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molybdenum ores (1)
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nickel ores (1)
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platinum ores (1)
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polymetallic ores (2)
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silver ores (1)
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metals
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actinides
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thorium (2)
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uranium (2)
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alkali metals
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lithium (2)
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potassium (1)
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rubidium
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Rb-87/Sr-86 (2)
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sodium (2)
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alkaline earth metals
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barium (1)
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beryllium (3)
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calcium (6)
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magnesium (3)
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radium (1)
-
strontium
-
Rb-87/Sr-86 (2)
-
Sr-87/Sr-86 (19)
-
-
-
aluminum (4)
-
arsenic (1)
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chromium (1)
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gallium (1)
-
gold (2)
-
hafnium
-
Hf-177/Hf-176 (6)
-
-
iron
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ferric iron (1)
-
ferrous iron (1)
-
-
lead
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Pb-206/Pb-204 (3)
-
Pb-207/Pb-204 (3)
-
Pb-208/Pb-204 (2)
-
-
manganese (3)
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mercury (3)
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niobium (3)
-
platinum group
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osmium (2)
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platinum ores (1)
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ruthenium (2)
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precious metals (1)
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rare earths
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cerium (2)
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europium (2)
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lanthanum (1)
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lutetium (1)
-
neodymium
-
Nd-144/Nd-142 (1)
-
Nd-144/Nd-143 (12)
-
Sm-147/Nd-144 (3)
-
-
samarium
-
Sm-147/Nd-144 (3)
-
-
scandium (4)
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yttrium (6)
-
-
silver (1)
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tantalum (1)
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titanium (1)
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tungsten (1)
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vanadium (1)
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zinc (2)
-
zirconium (3)
-
-
metamorphic rocks
-
amphibolites (1)
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cataclasites (1)
-
gneisses
-
orthogneiss (1)
-
-
impactites (1)
-
marbles (2)
-
metaigneous rocks
-
metabasalt (1)
-
metagranite (1)
-
-
metaplutonic rocks (1)
-
metasedimentary rocks
-
metagraywacke (1)
-
-
metasomatic rocks
-
skarn (3)
-
-
metavolcanic rocks (2)
-
mylonites (4)
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phyllites (1)
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quartzites (2)
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schists (3)
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slates (1)
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metamorphism (12)
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metasomatism (5)
-
meteorites
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Northwest Africa Meteorites (2)
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stony meteorites
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chondrites
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carbonaceous chondrites
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CV chondrites
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Allende Meteorite (8)
-
-
-
-
-
-
Mexico
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Chiapas Mexico (1)
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Trans-Mexican volcanic belt (2)
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-
mineral deposits, genesis (9)
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mineral exploration (4)
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mineralogy (1)
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minerals (2)
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Mohorovicic discontinuity (1)
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Moon (1)
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nitrogen
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N-15/N-14 (1)
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noble gases
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argon
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Ar-40/Ar-39 (1)
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helium (1)
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radon (1)
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nonmetal deposits (1)
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North America
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Appalachian Basin (1)
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Appalachians
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Appalachian Plateau (2)
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Blue Ridge Province (1)
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Central Appalachians (3)
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Piedmont (1)
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Southern Appalachians (1)
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Valley and Ridge Province (3)
-
-
Basin and Range Province
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Great Basin (3)
-
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Eastern Overthrust Belt (1)
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Western Canada Sedimentary Basin (1)
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Western Overthrust Belt (2)
-
-
Oceania
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Melanesia
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New Caledonia
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Noumea New Caledonia (1)
-
-
-
-
oil and gas fields (2)
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orogeny (8)
-
oxygen
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O-18/O-16 (17)
-
-
Pacific Ocean
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North Pacific
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Northwest Pacific
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South China Sea
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Qiongdongnan Basin (1)
-
-
Yellow Sea
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Bohai Sea
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Bohai Bay (1)
-
-
-
-
-
South Pacific
-
Southwest Pacific (1)
-
-
West Pacific
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Northwest Pacific
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South China Sea
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Qiongdongnan Basin (1)
-
-
Yellow Sea
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Bohai Sea
-
Bohai Bay (1)
-
-
-
-
Southwest Pacific (1)
-
-
-
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GeoRef Categories
Era and Period