T. Danelian et al., PALAEOCEANOGRAPHIC SIGNIFICANCE OF NEW AND REVISED PALEONTOLOGICAL DATINGS FOR THE ONSET OF VIGLA LIMESTONE SEDIMENTATION IN THE IONIAN ZONE OF GREECE, Geological Magazine, 134(6), 1997, pp. 869-872
Radiolarian and calpionellid dating establish a significant sedimentar
y hiatus within a reduced pelagic sequence of the central part of the
Ionian zone (western Greece). Bottom-current activity probably decreas
ed during the Oxfordian, allowing encroachment of radiolarian-rich sed
iments onto a Jurassic high (at Kato Kouklessi), and then increased ag
ain during Kimmeridgian-Tithonian time. The onset of Vigla Limestone s
edimentation is diachronous within the Ionian zone, spanning late Tith
onian to various levels of early Berriasian time. This diachroneity ca
n be explained by dispersal of fine-grained sediment by current activi
ty.