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JOURNAL OF MAPS 5
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Figure 4. Stratigraphic log of the Conca succession (Marettimo Formation). See text for more detail.
4.1.3.2 The Conca stratigraphic section. Along the
Punta Bassano headland (Main Map), 140-m-thick
alternating carbonates, marly calcilutites and marls out-
crop (MARb−c) are observed. The age is late Carnian –
early Rhaetian. Based on composition, grain size, and
fossils, we distinguished six main lithofacies (Figure 4):
(a) grey micritic limestone (CM), often dolomitized
and organized in a thick layer with abundant
pressure-solution stylolites; at places, pseudomorfs
of gypsum are present;
(b) laminated limestone (CL), laminated grey calcilu-
tites, black recrystallized limestone with fenestral
porosity, algal laminites with black bituminous
loferitic breccias;
(c) marly laminated limestone (CML), grey-yellowish
and bituminuos in places, in centimetric thin-
layered levels. Grey-yellowish thin-layered clayey
marls (MA), with oligotipic ostracod faunas;
(d) calcilutites and marly calcilutites with ‘lumachelle’
(C), grey-yellowish to hazel, with large shells (mol-
luscs and brachiopods gastropods), whose casts
and marks are evident above the stratal surfaces;
they are interbedded with the marls in centimetric
levels.