Keyphrases
Greenhouse
100%
Ordovician
100%
Icehouse
100%
40Ar-39Ar Age
80%
Bentonite
80%
Radioisotopic Age
60%
Biostratigraphic
60%
Sanidine
60%
U-Pb Geochronology
40%
Late Ordovician
40%
Conodont Zone
40%
Isotopic Carbon
40%
North America
20%
Volcanism
20%
Marine Strata
20%
Age Distribution
20%
Phenocrysts
20%
Sediment Accumulation
20%
Age Determination
20%
Speciation
20%
U-Pb Age
20%
Aging Model
20%
U-Pb
20%
Speciation Events
20%
Ash Beds
20%
North Atlantic
20%
Analytical Uncertainty
20%
Weighted Mean
20%
Biogeography
20%
Numerical Age
20%
Apparent Age
20%
Midcontinent
20%
Cenozoic
20%
Temporal Control
20%
Sweden
20%
Taconic
20%
Laser Fusion
20%
Conodonts
20%
Biostratigraphic Zonation
20%
Primary Control
20%
Ocean Response
20%
Decay Constant
20%
Geomorphic Response
20%
Quasi-continuous
20%
Graptolites
20%
Linear Interpolation
20%
Upper Mississippi Valley
20%
High-order Control
20%
Follow-up Control
20%
Point Order
20%
Cambrian Explosion
20%
Polar Ice Sheets
20%
Kinnekulle
20%
Cenozoic Era
20%
Temporal Distortion
20%
Graptolite Zone
20%
Earth and Planetary Sciences
Ordovician
100%
Bentonite
100%
Sanidine
75%
Interpolation
75%
Conodont
75%
Geochronology
50%
Late Ordovician
50%
Graptolite
50%
Volcanism
25%
Age Structure
25%
Phenocryst
25%
North Atlantic
25%
Ice Sheet
25%
Zonation
25%
Boundary Condition
25%
Biogeography
25%
Chorology
25%
Laser Fusion
25%
Mississippi
25%
Sweden
25%
Cenozoic Era
25%
Ordovician Period
25%