*2.2. Lithostratigraphy of Jurassic-Eocene Formations in the Ionian Basin*

All the study sections are situated within the middle-internal Ionian Zone, in Epirus region near Ioannina (Figure 2A–E). They represent to the Mesozoic-Paleogene pre- to post-rift sequences of Ionian zone, and particularly the upper part of Early Jurassic Pantokrator Limestones, the pelagic Early Cretaceous Vigla Limestones, the Late Cretaceous Senonian Limestones, and the microbreccious limestones of Paleocene/Eocene age. These formations are described in stratigraphic order as follows.

#### 2.2.1. Pantokrator Limestones and Lateral Equivalents

Early Jurassic (Hettangian to Sinemurian) Pantokrator Limestones represent the upper part of the pre-rift sequence of the Ionian zone [64,72]. This formation can be described as a neritic formation, consisted of limestones and dolomites with calcareous algae and benthic foraminifera of more than 1000 m of total thickness. These shallow-water limestones overlie Early to Middle Triassic evaporites (>2000 m thick) and the Foustapidima Limestones of the Ladinian–Rhaetian. Due to their remarkable facies' homogeneity, such Jurassic marine deposits represent an extensive carbonate platform at that time covering the entire region from the Apulian to the Gavrovo zone [58]. The overlying syn-rift sequence in the deeper part of the half-graben sub-basins begins with the Pliensbachian pelagic Siniais

Limestones and its lateral equivalent Louros Limestones (both indicative of the first deepening event of the Ionian basin), overlain in some sub-basins by the succession "Ammonitico Rosso", "Limestones with filaments", and "Upper Posidonia Beds", while in others, the "Ammonitico Rosso" is replaced by the coeval "Lower Posidonia Beds" in the previous sequence, or even the whole sequence is represented by the undifferentiated Posidonia Beds [34,58]. The boundary between the Pantokrator Limestones and Louros or Siniais Limestones is gradational.

′ ″ ′ ″ ′ ″ ′ ″ ′ ″ ′ ″ ′ ″ ′ ″ ′ ″ ′ ″ ′ ″ ′ ″ **Figure 2.** Google Earth maps of (**A**) Studied region in Epirus (NW Greece) into the red box; (**B**) Agios Georgios section (lat: 39◦16′14.99" N, lon: 20◦50′59.43" E); (**C**) Perivleptos section (lat: 39◦46′21.90" N, lon: 20◦46′48.34" E); (**D**) Vigla (lat: 39◦48′33.45" N, lon: 20◦43′38.73" E), Asprageli-1 (lat: 39◦45′57.42" N, lon: 20◦43′58.25" E) and Asprageli-2 (lat: 39◦49′54.00" N, lon: 20◦43′58.25" E) sections; (**E**) Koloniati section (lat: 39◦34′52.46" N, lon: 20◦53′11.41" E). The orange symbols mark the locations of the six study sections, and red dashed lines correspond to the major studied outcrops respectively.
