Related by context. Frequent words. (Click for all words.) 75 limestone 71 basalt 67 quartzite 64 granite 64 sandstones 63 schist 63 limestones 61 volcanic rock 61 rock formations 60 sedimentary rock 58 dolomite 58 calcite 58 bluestone 58 sedimentary 58 Sandstone 57 chert 56 quarried 56 andesite 55 granites 55 peridotite 55 stonework 54 pediment 54 marble 54 gabbro 53 rhyolite 53 carbonate 53 stone 53 outcrop 53 stone slabs 53 outcrops 52 silicified 52 Devonian 52 breccias 52 volcanics 52 laterite 52 petrified wood 51 travertine 51 brecciated 51 feldspar 51 metasediments 51 stratigraphy 51 sands 51 fieldstone 51 volcanic rocks 51 greenstone 51 brickwork 51 sedimentary rocks 50 stratigraphic 50 diorite 50 outcroppings 50 lithologies 50 sediments 50 mafic 49 buttes 49 breccia 49 granite slabs 49 Formation 49 ocher 49 felsic 49 silicification 49 outcropping 49 Paleozoic 49 ultramafic 49 flagstone 49 disseminated pyrite 49 terra cotta 48 geologically 48 gravels 48 quartz veins 48 Precambrian 48 rocks 48 footwall 48 sulphides 48 banded iron 48 olivine 48 hand hewn 48 Ordovician 48 stalactites 48 boulder 47 gossan 47 brick 47 disseminated sulphides 47 coal seams 47 terracotta 47 uranium mineralization 47 mineralization occurs 47 geological formations 47 excavated 47 pyrite 47 stone slab 47 quartz veining 47 quartz 47 veining 47 anticline 46 galena 46 iron oxide 46 masonry 46 hematite 46 stockwork 46 flagstones 46 geologic