| Liste Lithostratigraphie - Ordovizium (vorgelegt am 21.08.2009) | |||||||
| CHR_K | CHR_L | GRUPPE | FORMATION | REG_K | REG_L | IGL50 | Lfd Nr |
| OOC | Caradoc | Goldberg-Gruppe | - | GOLG | Goldberg-Gruppe | rgo | 1 |
| O | Ordovizium | Herscheid-Gruppe | - | HEG | Herscheid-Gruppe | oheg | 2 |
| OOC | Caradoc | 3 | |||||
| OML | Llanvirm | 4 | |||||
| O | Ordovizium | Herscheid-Schichten | HER | Herscheid-Schichten | ohe | 5 | |
| OOC | Caradoc | 6 | |||||
| OML | Llanvirm | 7 | |||||
| OOC | Caradoc | Solingen-Formation | SOLI | Solingen-Formation | os | 8 | |
| OOC | Caradoc | Rahlenberg-Formation | RAHL | Rahlenberg-Formation | ora | 9 | |
| OML | Llanvirm | 10 | |||||
| OML | Llanvirm | Plettenberg-Formation | PLE | Plettenberg-Formation | opl | 11 | |
| OM | Mittelordovizium | Salm-Gruppe | - | SAL | Salm-Gruppe | osa | 12 |
| OML | Llanvirm | 13 | |||||
| OMR | Arenig (o. Teil) | 14 | |||||
| OUMR | Arenig | 15 | |||||
| OU | Unterordovizium | 16 | |||||
| OUR | Arenig (u. Teil) | 17 | |||||
| OUT | Tremadoc | 18 | |||||
| OU | Unterordovizium | Thönbach-Formation | THOE | Thönbach-Formation | oto | 19 | |
| OUR | Arenig (u. Teil) | 20 | |||||
| OUT | Tremadoc | Wehebach-Formation | WEHE | Wehebach-Formation | owe | 21 | |
| WEHO | Obere Wehebach-Formation | oweo | 22 | ||||
| WEHM | Mittlere Wehebach-Formation | owem | 23 | ||||
| WEHU | Untere Wehebach-Formation | oweu | 24 | ||||