Related by context. Frequent words. (Click for all words.) 59 excavated 58 middens 56 arrowheads 55 henge 55 termite mounds 55 lava tubes 55 freshly dug 54 bridge abutments 54 cairns 53 excavation 53 midden 53 pottery shards 52 knolls 52 rock outcrops 51 palisade 51 stone slabs 51 archaeologists 51 mounds 51 petroglyph 51 microfossils 51 fossils 51 burial mounds 51 lunar soil 50 flint tools 50 rock outcrop 50 excavate 50 trackways 50 stalactite 50 pictograph 50 archeologists 50 megaliths 50 trackway 50 decomposed granite 49 prehistoric 49 flagstones 49 woodpiles 49 caissons 49 archeological digs 49 concrete footings 49 Mesolithic 49 leafless trees 49 cliff dwellings 49 tepees 49 Radiocarbon dating 49 digging 49 tightly spaced 49 bulrushes 49 flints 48 pictographs 48 borings 48 hieroglyphs 48 granite stones 48 Harappan 48 archeological 48 trenches dug 48 stone slab 48 archaeological 48 anthills 48 tule 48 chert 48 sarcophagi 48 tree stumps 48 marl 48 hand hewn 47 excavations 47 setts 47 arrowhead 47 moraines 47 wooden pegs 47 root cellar 47 bones 47 petrified wood 47 excavating 47 lintels 47 trench 47 stromatolites 47 mussel shells 47 brushpiles 47 caliche 47 wood planks 47 fieldstone 47 moss covered 47 streambed 46 Iron Age 46 archaeological finds 46 fossilized bones 46 obelisks 46 lean tos 46 tetrapod 46 trilobites 46 dirt 46 wigwams 46 dig trench 46 cairn 46 carvings 46 dug 46 rock outcroppings 46 cenotes 46 interpretive signage 46 crushed limestone 46 roadbeds