Earth and Planetary Sciences
Coal
100%
Kentucky
58%
Investigation
48%
United States of America
32%
Model
28%
Analytical Method
26%
Region
26%
China
25%
Lake
25%
Sediment
24%
Ash
24%
Petrography
24%
Sample
22%
Implication
21%
Rare Earth Element
18%
Bed
17%
Show
16%
Groundwater
15%
Geochemistry
15%
Minerals
15%
Depth
15%
Variation
14%
Evaluation
14%
Tectonics
14%
United States
14%
Maceral
14%
Fault
14%
Rock
13%
Record
13%
River
13%
Pennsylvanian
13%
Approach
12%
Deformation
11%
Content
11%
Plant
10%
Soils
10%
Mining
10%
Occurrence
10%
Aquifer
10%
History
10%
Water
10%
Mineralogy
9%
Carbon
9%
Earthquake
9%
Holocene
9%
Utilization
9%
Impact
9%
Estimate
9%
Vitrinite
9%
Deposit
8%
Characterization
8%
Zircon
8%
Ordovician
8%
Clay
8%
Coal Combustion
8%
Observation
8%
Magnetic Anomalies
8%
Behavior
8%
Enrichment
8%
Sulphur
8%
Maps
7%
Correlation
7%
Rate
7%
India
7%
Mountains
7%
Arsenic
7%
Combustion
7%
Quaternary
7%
Province
7%
Margin
7%
Landscape
7%
Hazards
7%
Core
7%
Mississippian
7%
State
6%
Position (Location)
6%
Anthracite
6%
Succession
6%
Rill
6%
Brazil
6%
Variability
6%
Landslide
6%
Information
6%
Illinois
6%
Iron Ore
6%
Permian
6%
Pyrite
6%
Wave
6%
Particles
6%
Lithotype
6%
Average
6%
Marshland
6%
Climate
6%
Palynology
6%
Texas
6%
Carbon Dioxide
6%
Organic Matter
6%
Quality
6%
Amount
5%
Creek
5%
Engineering
Coal
35%
Model
10%
Elements
9%
Prediction
7%
Characteristics
6%
Independent Variables
5%
Combustion
5%
Coal Combustion
5%
Electric Power Plant
5%
Surface
5%
Evaluation
5%