Related by context. Frequent words. (Click for all words.) 74 Triassic 72 Cretaceous 72 Ordovician 69 Eocene 69 Miocene 68 Paleozoic 64 Jurassic 63 Precambrian 63 Proterozoic 62 sandstones 61 sedimentary rocks 60 Mesozoic 60 Pliocene 58 stratigraphic 56 Archean 55 stratigraphy 54 sedimentary 54 volcanics 53 Tertiary 52 shales 52 sandstone 52 geologically 51 intrusive rocks 51 anticline 50 Sandstone 50 gabbro 50 carbonate 50 Formation 49 granites 49 Pleistocene 49 undrilled 49 sediments 49 metasediments 49 hydrocarbon bearing 49 volcanic rocks 49 mafic 49 shallow depths 48 carbonatite 48 lithology 48 massive sulphide mineralization 48 granodiorite 48 magmatic 48 andesite 48 uranium mineralization 48 ultramafic 48 massive sulfide 47 sedimentary rock 47 dolomite 47 shear zones 47 lithologies 47 mineralized 47 footwall 47 banded iron 46 sulphides 46 geologic 46 Shale 46 breccia 46 porphyry 46 pegmatite 46 unconformity 46 carbonates 46 stockwork 46 mineralization 46 underlain 45 hydrothermal alteration 45 Bakken formation 45 silicified 45 gravels 45 epithermal 45 gold mineralization 45 disseminated sulphides 45 sulphide mineralization 45 calcite 45 greenstone belt 45 brecciated 45 copper mineralization 45 molybdenum mineralization 45 sulphide 44 felsic 44 breccias 44 skarn 44 diamondiferous 44 Permian 44 sulfide mineralization 44 hydrothermal 44 fossils 44 geological formations 44 Mineralization 44 structurally controlled 44 diorite 44 silicification 43 sands 43 massive sulphides 43 pegmatites 43 northeast trending 43 Woodford Shale 43 Formations 43 steeply dipping 43 quartz vein 43 geological 43 orebodies