The stratigraphy of Turnu Rosu region is very complicated. Even if the fossiliferous area has only a few tens of hectares the geologic situation is not quite clear. The layers are very hard to follow because of faults and facies variations. Only in 2 places a vertical succession can be followed but it differs from one place to another. The last information on stratigraphy is coming from an article published by proffesor Nicolae Meszaros in 1996("The stratigraphy of Turnu Rosu-Porcesti region" - original title: "Stratigrafia regiunii Turnu Rosu - Porcesti" ). He separates 3 formations:
| Turnu
Rosu Group |
Nisu
Valley Formation |
Basal
Oligocen |
Sandstones
with fish scales and fish teeth |
Priabonian |
Sandstones, calcareous sandstones with moluscs and selachii teeth Conglomerates with Nummulites fabianii and Clamys biarritzensis |
||
Strada Muntelui Formation |
Lutetian - Priabonian |
Limestons with Nummulites millecaput and Campanile giganteum Limestones with Nummulites laevigatus, Nummlites distans and moluscs |
|
Satu Valley
Formation |
Cuisian |
Calcareous sandstones with moluscs Conglomerates with Ampullinopsis porcesti Sandstones, conglomerates and marls with Nummulites planulatus Clay with foraminiferae* |
Satu Valley formation contains also: Nummulites aquitanicus, N. globulosus, Ampullospira hybrida, Ampullina patula, Ostrea sp. Spondylus sp.
Strada Muntelui formation contains also: Nummulites gallensis, N. murchinsoni, Assilina exponens, Assilina praespira, Operculina praespira, Operculina alpina, Discocyclina nummulitica, Asterociclina stella, Velates schmidelianus, Terebellum cf. fusiforme, Terebelum sopitum, Globularia patula, Cassidaria nodosa, Cepatia cepacea, Conus deperditus, Campanile giganteum, Campanile parisiensis, Ficus greenwoodi, Lucina mutabilis, Miltha giganthea, Spondylus rarispinus.
Nisu Valley formation contains also: Pholadomia puschii, Ostrea sp. Ampulospira hybrida.
* Data according to Nicolae Meszaros - Stratigrafia regiunii Turnu Rosu - Porcesti, in Convergente Transilvane, 4: 25-30, Sibiu.