Sedimentological infill of the Middle Triassic half-graben below Mt. Vernar in Julian Alps, Slovenia

Early beginnings of the Middle Triassic extension in areas surrounding western embayment Neotethys are evidenced formation small half-graben basins, local emergences underlying platform, and/or deposition coarse-grained breccia. The succession related to creation and infilling one these half-grabens is exposed on slopes base Mt. Vernar eastern Julian Alps, Slovenia. lowermost unit within Uggowitz Breccia, which attains thickness up 150 m. It followed by a few tens meters red nodular limestone (the informal 'Vernar member'), second, thinner Breccia unit, succeeded sandstone sandy “Krma member”), rich shallow marine foraminifers plant material. basin-filling indistinctly bedded then massive Schlern Formation. Late Anisian (Ilyrian) age assumed for sediments based clast composition comparison with regional sequence stratigraphic schemes. Breccias likely deposited or marginal setting. Individual beds interpreted as subaqueous debris-flow deposits.