Irben Formation
| Belongs to | Lower Cambrian (old nomenclature) |
| Type | lithostratigraphy |
| Rank | Formation |
| Scope | regional |
| Status | formal standard |
| Author | Mens & Pirrus |
| Year | 1972 |
| Age (Ma) | Vērgale Stage |
| Index | Cm2ir |
| Alt. index | Ca1ir |
| Alt. index | Ꞓ1ir |
| Date added | 2012-10-16 |
| Date changed | 2022-11-18 |
Locality | Type | From (m) | To (m) | Reference | Remarks | |
|---|---|---|---|---|---|---|
| Pavilosta 51 borehole | holostratotype | 1329 | 1387 | Lieldiena & Fridrihsone, 1968 |
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