Related by context. Frequent words. (Click for all words.) 69 paleoclimate 64 geologic 64 lake sediments 63 geomorphology 63 geological 63 isotopic 63 marine sediments 62 oxygen isotopes 62 microfossils 62 biogeochemical 62 sediment cores 61 isotopic composition 61 depositional 60 elemental composition 60 igneous rocks 59 landforms 59 crustal 58 numerical simulations 58 glaciation 58 bathymetry 57 astronomical observations 57 transect 57 radiocarbon 57 latitudinal 57 extensional 56 geochemical 56 glacial retreat 56 Quaternary 56 lunar soil 56 spherules 56 basaltic 56 stalagmite 55 interglacial period 55 polar vortex 55 Remote sensing 55 hydrothermal activity 55 zircons 55 radiocarbon dating 55 lavas 55 magmas 55 oceanic crust 55 lithosphere 55 Snowball Earth 55 paleontological 55 Paleocene 54 mineralogy 54 plate tectonics 54 stalagmites 54 volcanism 54 mineralogical 54 continental crust 54 morphologies 54 geology 54 foraminifera 54 Tibetan Plateau 54 methane hydrate 54 glacial melt 54 abundances 54 Younger Dryas 54 kimberlitic 54 lithological 53 quantitative measurements 53 areal extent 53 anisotropy 53 fossilization 53 Pliocene 53 sedimentary 53 CRISM 53 Palaeolithic 53 sedimentary basins 53 Ordovician 53 geological geophysical 53 stromatolites 53 sediments 53 lava tubes 53 igneous rock 53 mud volcanoes 53 tectonics 53 basalts 53 Late Cretaceous 53 systematics 52 magnetic reconnection 52 subsurface 52 photometry 52 Geological mapping 52 anomalously 52 igneous 52 biogeochemistry 52 Cepheids 52 geological formations 52 landform 52 solar irradiance 52 atmospheric methane 52 terrestrial ecosystems 52 Antarctic ozone 52 aeromagnetic 52 polar caps 52 geochemistry 52 paleo 52 Mini SAR 52 geophysicists