Related by context. Frequent words. (Click for all words.) 54 abiotic 50 methane hydrate 49 nonrenewable resource 49 technically recoverable 48 extraction 48 EROI 48 biogenic 47 hydrocarbons 46 biodiesels 46 kerogen 45 Tar sands 45 CO2 sequestration 45 gas hydrates 45 oil 44 hydrocarbon 44 macroevolution 43 sedimentary basins 43 OOIP 43 methane hydrates 43 subsurface 42 geochemists 42 geological formations 42 Coal gasification 42 isoprene 42 microfossils 42 discoveries 42 cretaceous 42 hypothesis 41 Fischer Tropsch 41 meteorite impacts 41 anthropogenic global warming 41 isotopic 41 PLOWBOY 41 essentialism 41 fracturing fluids 41 James Lovelock 41 geophysicists 41 insitu 40 Carbon sequestration 40 semisolid 40 extractable 40 hydrothermal fluids 40 paleoclimate 40 petroleum 40 ILUC 40 nanobacteria 40 geological 40 Patzek 40 Horizontal drilling 40 alternative energies 40 desalting 40 geological geophysical 40 petrochemistry 39 unevaluated 39 hydrocarbon reserves 39 Caspian basin 39 methanogens 39 sociobiology 39 depositional 39 Athabasca oilsands 39 hydro fracking 39 algae biofuels 39 scientific 39 producible 39 fossilization 39 geologists 39 scientism 39 Jeremy Rifkin 39 geologic 39 mud volcanoes 39 shale 39 Utica shale 39 diatomite 39 discoverer 38 geological prospecting 38 alluvial deposits 38 radiocarbon 38 Bakken formation 38 commercially recoverable 38 palm cultivation 38 empiricist 38 fractal geometry 38 massive sulphide deposit 38 Synthetic biology 38 unconventional shale 38 vaporization 38 clastic 38 thermo chemical 38 clathrates 38 ° API 38 minable 38 Lower Tertiary 38 elementary particle physics 38 natural gas 38 synthesis 38 geologically 38 Ausubel 38 theory 38 elemental composition 38 carbonic acid 38 numerical simulations