Česko-estonská stratigrafie: Porovnání verzí

| colspan="3" | '''silur''' ''silur''
|-
| rowspan="1820" | ordovician '''ordoviitsium''' ''ordovik''
| rowspan="68" | upper ordovician
| style="border-bottom:double;" | hirnantian
| rowspan="4" | '''harju'''
| '''nabala''' ||   ||   ||   ||  
|-
| rowspan="57" | '''viru'''
|   ||   ||   ||   ||  
|-
| rowspan="3" style="border-bottom:double;" | sandbian
|   ||   ||   ||   ||  
|-
|   ||   ||   ||   ||  
|-
| style="border-bottom:double;" | sandbian
| style="border-bottom:double;" |  
|   ||   ||   ||  
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