Related by context. Frequent words. (Click for all words.) 68 lithosphere 66 oceanic crust 64 continental crust 61 crustal 59 basalts 59 subduction 58 calcareous 58 landmasses 57 lavas 57 basaltic 56 siliceous 56 extensional 56 mudstone 55 olivine 55 granitic 55 Earth crust 54 mafic volcanic rocks 54 earth crust 54 felsic 54 depositional 54 carbonate rocks 54 limestones 54 subduction zone 54 breccia zones 54 jasperoid 54 sedimentary 54 magmatic 53 Paleozoic 53 peridotite 53 subduction zones 53 igneous 53 carbonaceous 53 marine sediments 53 tectonics 53 graben 53 pyroxenite 53 quartz veinlets 53 andesite 52 schists 52 calcite 52 anisotropy 52 gabbro 52 tuffs 52 basalt 52 tectonic 52 mafic volcanics 51 temperature gradient 51 rhyolite 51 ocean ridges 51 mafic 51 intrusive rocks 51 intrusives 51 Eocene 51 sedimentary rocks 51 volcanism 51 Tibetan Plateau 51 volcanic rocks 51 ultramafic rocks 51 Quaternary 51 gneiss 51 outer crust 50 sedimentary basins 50 sulphide bearing 50 sedimentary rock 50 sulphide minerals 50 chalcocite 50 metasedimentary rocks 50 talus 50 stratabound 50 temperate forests 50 poleward 50 landforms 50 caldera 50 magma chamber 50 Precambrian 50 tectonic plate 50 argillic alteration 50 lava flows 50 iron oxides 50 glacial till 50 magma 50 graphitic 50 Fig. 1A 50 latitudinal 50 Ordovician 50 quartz carbonate 49 ultramafic 49 Weddell Sea 49 breccia 49 planktonic 49 granites 49 siltstone 49 Mesozoic 49 hydrothermal 49 lava tubes 49 glacial ice 49 foraminifera 49 GPa 49 meltwater 49 interbedded 49 alluvium