Ärina Formation
General info
| Belongs to |
Baltic lithostratigraphy (Ordovician)
|
| Type | lithostratigraphy |
| Rank | Formation |
| Scope | regional |
| Status | formal standard |
| Author | Grigelis |
| Year | 1978 |
| Etymon | Ärina, place in central Estonia |
| Age (Ma) |
Porkuni Stage
|
| Index | FIIÄ |
| Alt. index | O3är |
| Date changed | 2022-06-10 |
Stratotypes
| Locality | Type | From (m)1 | To (m)2 | Reference | Remarks |
|---|---|---|---|---|---|
| Ärina |
holostratotype
| Männil, Ralf & Rõõmusoks, 1984 | outcrop [boulders?], Estonia |
| Stratigraphy | Index | Index add'l | Type | Rank | Scope | Belongs to | Age base (Ma) | Age top (Ma) | Age |
|---|---|---|---|---|---|---|---|---|---|
| Kamariku Member | FIc-FIIÄ'K | O3ärK |
lithostratigraphy
|
Member
|
regional
| Ärina Formation |
Porkuni Stage
| ||
| Siuge Member | FIc-FIIÄ'S | O3ärS |
lithostratigraphy
|
Member
|
regional
| Ärina Formation |
Porkuni Stage
| ||
| Tõrevere Member | FIc-FIIÄ'T | O3ärT |
lithostratigraphy
|
Member
|
regional
| Ärina Formation |
Porkuni Stage
| ||
| Vohilaid Member | FIc-FIIÄ'V | O3ärV |
lithostratigraphy
|
Member
|
regional
| Ärina Formation |
Porkuni Stage
|
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