Page 107 - MSc_thesis_R A Kil

– Facies overview

r [µm] Description & Interpretation

0–2000 Thick units deposited by very high sedimentation rates. Non fragmented
bioclasts are abundant.

± 300 Relatively fine lamination parallel to bedding, most likely caused by a
lower plane flow regime.

— Upper flow regime beds developing undulated lamination, in some cases
small antidunes are preserved. Locally the amount of energy causes scours
to form, immediately filled with homogeneous material due to the hydraulic
jump. Big scours due to erosion are infilled by structureless deposits.

0–2000 Locally very large foresets, interpreted as prograding dunes with palaeo-
transport direction indicated by highest dip angle. Some units on-lap on
their base, and occasionally periodic cyclicity in the thickness of lamina is
observed.

0–2000 The trough cross bedded calcarenites are generated by dunes with curved
crests.

— Very large scale foresets, up to 15 m in height. Indicates giant dunes
prograding in the main transport direction. Concentrated in specific parts
of the island.

— Thick units with no recognizable structure, indicating long periods without
energy and sediment supply. The beds are usually without any depositional
dip.

— Found at the lower boundary of the East-Favignana sequence. Possibly
known as the Trubi Formation across other parts of the Mediterranean.