Related terms:
diatomaceous earth
diatoms
microcrystalline
diagenesis
laminae
clastic sedimentary rocks
abies alba
n ratio
sedimentary facies
brown to black
play of color
black opal
based soil
variety of chert
limestone formations
hecate strait
coastal upwelling
type of soil
cork oak forests
Wikipedia sources:
Biogenic silica
Forests of the Iberian Peninsula
Diatom
Sponge reef
Micropaleontology
Sedimentary rock
Oil shale geology
List of vineyard soil types
Chert
Opal
Context for words:
siliceous
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