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Earth and Planetary Sciences
Carbon 14
100%
Eocene
69%
Organic Matter
60%
Paleocene
60%
Isotopic Composition
51%
Olduvai Event
46%
Alkane
46%
Fractionation
44%
Miocene
41%
Vegetation
41%
Organic Carbon
39%
Canyon
37%
Carbon Dioxide
34%
Alkenone
30%
Atmospherics
30%
Water Column
26%
Organic Carbon
26%
Polycyclic Aromatic Hydrocarbon
26%
Grassland
25%
Pleistocene
24%
n-Alkane
22%
Holocene
22%
Climate Change
21%
Black Sea
21%
United States of America
21%
Isotopic Fractionation
20%
Lacustrine Deposit
19%
Surface Water
18%
Particulate Organic Matter
18%
Aridity
18%
Environmental Change
17%
Paleogene
17%
Methane
17%
Tanzania UR
17%
Eastern Africa
16%
Isotopic Analysis
16%
Carbon Cycle
16%
Peru
14%
Wyoming
14%
Mass Spectroscopy
14%
Photic Zone
13%
Soil Carbon
13%
Phytoplankton
12%
C4 Plant
12%
Human Habitat
12%
Middle Ordovician
12%
Source Rock
12%
Amino Acid
12%
Planetary Atmosphere
11%
Global Warming
11%
Keyphrases
Carbon Isotopes
82%
N-alkanes
61%
Paleocene-Eocene Thermal Maximum
47%
Olduvai Gorge
39%
Lipid Biomarkers
37%
Lipids
35%
Isotopic Composition
35%
Total Organic Carbon
33%
Cyanobacteria
31%
Alkenones
31%
Organic Matter
30%
Polycyclic Aromatic Hydrocarbons
29%
Partial Pressure of CO2 (pCO2)
27%
Water Column
26%
Organic Carbon
24%
Olduvai
22%
Bighorn Basin
22%
Angiosperms
21%
C4 Grasses
21%
Carbon Isotope Excursion
20%
Black Sea
18%
Late Miocene
18%
Climate Change
17%
Tanzania
17%
Archaebacteria
16%
Environmental Change
16%
Amino Acids
16%
Compound-specific Isotope Analysis
15%
Organic Acids
15%
Isotope Fractionation
15%
Phytane
15%
Aridity
14%
Wyoming
14%
C4 Plants
14%
Organic Geochemical
14%
Carbon Isotope Fractionation
13%
Acetic Acid
13%
Surface Water
13%
Pristane
13%
Atmospheric CO2 Concentration
13%
Plant Biomarkers
13%
Isoprenoids
13%
D-value
12%
Chemocline
12%
Nitrogen Cycle
12%
Middle Ordovician
12%
Chlorin
12%
Fossil Carbon
12%
Surface Sediments
12%
Orbitrap MS
12%