Related by context. Frequent words. (Click for all words.) 56 Archaean 54 Paleocene 53 Early Cretaceous 53 Ordovician 53 calcareous 52 lake sediments 52 metamorphism 52 basalts 52 igneous 52 schists 52 morphologically 52 marine sediments 51 Dmanisi 51 basaltic 51 californica 51 vulgaris 51 erectus 51 gastropods 51 Cenozoic 51 loess 50 igneous rocks 50 Carboniferous 50 tuffs 50 granitic 50 magmatic 50 massive sulphide deposits 50 lavas 50 Proterozoic 50 baleen whale 50 trilobites 50 stromatolites 50 Mesozoic 49 igneous rock 49 Upper Paleolithic 49 Late Cretaceous 49 spp 49 remnant 49 gossans 49 volcanic islands 49 erosional 49 elegans 49 snail shells 49 monazite 49 Precambrian 49 microfossils 49 Silurian 49 clasts 49 temperate forests 49 overlies 49 gneiss 49 andesitic 49 middens 49 metamorphic rocks 49 granitic rocks 49 faunal 49 Indohyus 49 porphyries 48 ammonites 48 theropod 48 carbonaceous 48 quartz monzonite 48 granites 48 hydrothermal activity 48 tetrahedrite 48 gneisses 48 pluton 48 haplogroup 48 taxa 48 Upper Cretaceous 48 Paleozoic 48 Harappan 48 biodiversity hotspot 48 plesiosaurs 48 stalactite 48 graben 48 volcanics 48 inhabitation 47 metasediments 47 systematics 47 bornite 47 pegmatites 47 limestones 47 japonica 47 Neandertal 47 Archaea 47 Palaeolithic 47 lichens 47 marine reptiles 47 Late Triassic 47 carbonate replacement 47 depositional 47 unicellular 47 preserved fossils 47 surficial 47 kaolinite 47 stratiform 47 hydrothermal vent 47 Jurassic Period 47 cycad 47 isotopic composition 47 ibex