Česko-estonská stratigrafie: Porovnání verzí

| colspan="3" | '''silur''' ''silur''
|-
| rowspan="2224" | ordovician '''ordoviitsium''' ''ordovik''
| rowspan="10" | upper ordovician
| style="border-bottom:double;" | hirnantian
| '''idavere''' ||   ||   ||  
|-
| rowspan="79" | middle ordovician
| rowspan="6" style="border-bottom:double;" | darriwilian
| '''uhaku''' ||   ||   ||   ||  
| '''aseri''' ||   ||   ||   ||  
|-
| rowspan="911" | '''ölandi'''
| rowspan="2" | '''kunda'''
|   ||   ||   ||  
|-
|   ||  
| rowspan="57" style="border-bottom:double;" | ''arenig''
|  
|-
| rowspan="24" style="border-bottom:double;" | '''volhovi''' volkhov ''volchov''
|   ||   ||  
|-
| rowspan="3" style="border-bottom:double;" | dapingian
|   ||   ||  
|-
|   ||   ||  
|-
| style="border-bottom:double;" | dapingian
|   ||   ||  
|-
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