Keyphrases
Illinois Basin
55%
Illinois
53%
High-resolution
35%
Conodonts
34%
Shale
30%
Southern Illinois
30%
Ireviken
29%
Moccasins
27%
Positive Carbon Isotope Excursion
24%
Graptolites
20%
Missouri
19%
Ludlow
18%
Wenlock
16%
Bailey
15%
Portable X-ray Fluorescence (pXRF)
15%
Sheinwoodian
15%
Commerce
14%
Carbon Isotopes
14%
Creek
13%
Pridoli
13%
Biostratigraphic
12%
Homerian
12%
Chronostratigraphic
10%
Silurian Strata
10%
Carbon Isotope Excursion
9%
Geological Lineaments
9%
Trilobites
9%
Bryozoa
9%
Arkansas
9%
Mississippian
8%
Upper Ordovician
8%
Stage Boundary
7%
Reconnaissance
7%
Kentucky
7%
Tempestite
7%
Redox Cycling
7%
Ludfordian
7%
Drill Core
7%
Cubichnia
6%
Elemental Chemostratigraphy
6%
Detrital Zircon Geochronology
6%
Laurussia
6%
Hypostome
6%
Mechanical Analogy
6%
Wing Plate
6%
Telychian
6%
Sedimentary Phosphate
6%
Tectonic Faulting
6%
Geologic Time Scale
6%
Quaternary Tectonics
6%
Earth and Planetary Sciences
Illinois
100%
Silurian
36%
Carbon 14
35%
Conodont
29%
Devonian
22%
United States of America
21%
Graptolite
18%
Missouri
14%
X-Ray Fluorescence Spectroscopy
13%
Chemical Element
12%
Ludlow
11%
Chemostratigraphy
11%
Tempestite
10%
Bryozoan
10%
Pridoli
10%
Ordovician
8%
Rare Earth Element
8%
Mississippian
7%
Tectonics
7%
Kentucky
7%
Reconnaissance
7%
Outcrop
7%
Arkansas
7%
Siltstone
6%
Lochkovian
6%
Geochronology
6%
Morocco
6%
Zircon
6%
Trackway
6%
Near-Surface Geology
6%
Chondrite
6%
Ichnofossils
6%
Fault Zone
6%
Brachiopod
6%
New Genus
6%
Sandstone
6%
Morphology
5%
Geological Survey
5%
Inductively Coupled Plasma Method
5%