Official Journal of the Asia Oceania Geosciences Society (AOGS)
Geological age | Symbol | Main lithology |
---|---|---|
Quaternary | Q | Sandy clay, clay rock |
Tertiary | E | Clay rock, siltstone, glutenite |
Middle Devonian | D2 | Limestone, calcium schist |
Lower Devonian | D1 | Calcium schist, calcium sandstone, granite |
Silurian | S | Phyllite and siliceous rock, sandstone |
Ordovician | O | Argillaceous limestone, carbonaceous schist, quartzite |
Cambrian | Є | Limestone, slate, phyllite |
Senian | Z | Limestone, quartzite, schist |