|
| Ages | Group | Formation | Thickness (m) | Rock type |
|
| Neogene to Late Cretaceous | Siwalik group | Upper Siwalik (US) | 560-1000 | Thick fluvial conglomerate punctuated by fluvial sandstone |
| Middle Siwalik (MS) | 2400-6300 | Sandstones punctuated by thin shale beds and become coarser grained upwards |
| Lower Siwalik (LS) | 1100-2800 | Interbedded sandstone and shale |
| Fault |
| Surkhet group | Suntar (Su) | 1000-1600 | Upper part is red and green shale with sandstone, lower part is green micaceous sandstone with shale. Potential reservoir rock |
| Unconformity |
| Swat (Sw) | 20-200 | Dark to grey shale with lense of fined grained fossiliferous limestones |
| Unconformity |
| Melpani (Mp) | 50-700 | Ferruginous quartzites and sandstones intercalated with carbonaceous dark shales. Potential source rock |
| Unconformity |
| Late Carboneferous to Early Cretaceous | Gondwana group | Charchare | 1000 | Gray, dark gray shale, calcareous shale and diamictite with conglomerate beds. Potential source rock |
| Unconformity |
| Mesoproterozoic | Lakharpata group. | Aru | 0-100(?) | Dense dolomite with lesser amount of sandstone and shale |
| Katwa | 100 | Dark grey to black shales with minor stromatolic dolomite |
| Khara | 250 | Dark grey, microcrystalline limestone, and shale |
| Gawar (Gw) | 600 | Grey dolomite, stromatolitic dolomite, limestone, shale, brown slate, and quartzite. Potential reservoir rock |
| Ramkot (Rm) | 500-850 | Purple to grey sandstone and shale. |
| Sangram (Sg) | 850-1700 | Black shale and fine-grained quartzite intervals. Potential source rock |
| Paleoproterozoic | Lesser Himalaya metasediments | Nabhistan (Nb) | 860-1750 | Pellitic phyllite, grey quartzite, schist, and metabasites |
| Dubidanda (Dbd) | 1600-2500 | Micaceous quartzite with pellitic phyllite and schist |
| Lesser Himalaya crystalline | Gitachaur (Gc) | 1060-1300 | Biotite-schist with quartzite and thin beds of carbonaceous schist. |
| Parajul (Pa) | 60-300 | Grey biotite quartzite with schist. |
| Dailekh (Da) | 0-370 | Grey, garnetiferous mica schist |
| Dungeshworl (Du) | | Schist, biotite quartzite, granite. |
| Higher Himalaya | Tistung (Ti) | 0-1200 | Grey phyllites, purplish tinted sandstone with sandy limestone |
| Kalikot (Kk) | 0-1800 | Biotite schists and micaceous quartzite with gneiss. |
| Raniban (Ra) | 800-1000 | Grey schist, biotite rich quartzite, and biotite gneiss |
| Gothi (Go) | 250-1450 | Grey schist with biotite quartzite |
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