concretions

Related by string. concretion * * = -concretion mixture . concretion mixture *

Related by context. Frequent words. (Click for all words.) 71 spherules 64 olivine 61 lavas 61 lunar soil 61 calcite 61 zircons 60 silicates 60 salt crystals 60 petrified wood 60 Meridiani 59 isotopic composition 59 stromatolites 59 igneous 59 iron oxides 58 calcareous 58 sedimentary rock 58 crystals 57 agates 57 microfossils 57 apatite 57 garnets 57 globules 56 landforms 56 fossils 56 basaltic 56 basalts 56 meteorites 56 hematite 56 basalt 56 quartz crystals 56 diatoms 56 alternating layers 55 trilobites 55 lichen 55 carbonaceous 55 foraminifera 55 morphologies 55 tiny specks 55 oxygen isotopes 55 Meteorites 55 middens 54 coprolites 54 obsidian 54 volcanic rock 54 fossilized 54 fragments 54 marine sediments 54 chert 54 hydroxyapatite 54 regolith 54 geodes 53 oceanic crust 53 silicate 53 mudstone 53 fossilized bones 53 abundances 53 organic molecules 53 lake sediments 52 meteorite 52 melanosomes 52 continental crust 52 striations 52 plesiosaur 52 silica 52 zeolites 52 pebbly 52 solar nebula 52 dinosaur bones 52 sediments 52 rocks 52 reddish color 52 feldspar 52 sulfides 52 rock outcrops 52 calcium carbonate 51 rocky planets 51 malachite 51 whitish 51 planetary nebulae 51 nacre 51 abiotic 51 siliceous 51 microstructures 51 blobs 51 mica 51 crystalline structure 51 sulphates 51 outcrops 51 marine invertebrates 51 seashells 51 diatom 51 flints 51 ice crystals 50 tuffs 50 sedimentary rocks 50 colloid 50 nanoscopic 50 reddish 50 globular 50 clays 50 sea anemones

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