colorful rock hand sample of banded iron ore

abstract art artistic atmosphere bacterial banding bedrock chemical chemistry chert clues compressed compression crust cut design distortion earliest earth excretion fe geologist geology history hues liquid lithification lithified lithosphere meta metamorphic metamorphism metamorphosed metamorphosis mineralogist mineralogy oceanic oxygen oxygenation palette petrologist reaction read record science sed sedimentary sinuous stone stony tigerseye varietal variety warped