Related terms:
opabinia
endosymbiosis
early cambrian
geochemical
archean
late mississippian
coconino sandstone
body fossils
world heritage area
geologic column
monkey mia
streams flowing
tonto group
metazoan
lower layers
hard parts
billion years ago
faunal succession
free oxygen
continental mass
microbial mat
some bacteria
Wikipedia sources:
Stromatolite
Microbial mat
Shark Bay
Fossil
Cambrian explosion
Proterozoic
Evolutionary history of life
Panspermia
Geology of the Grand Canyon area
Context for words:
stromatolites
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