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хирнантский
 хирнантский
geol. Hirnantian
| ярус
 ярус
gen. circle; layer; horizon; storey; story; assise
chem. compartment

to phrases
хирнантский adj.stresses
geol. Hirnantian (MichaelBurov)
хирнантский ярус
: 19 phrases in 3 subjects
Geochronology5
Geology10
Stratigraphy4