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F. Pepe et al. / Geomorphology 303 (2018) 191–209 203
boulders and sockets originated from different layers of the beach/ Our approach in the interpretation of the litho-structural and hydro-
near foreshore complex system outcropping in the Favignana Island dynamic control on boulder coastal deposits at Favignana Island rocky
coastal zones; coast (Sicily, Italy), may be regarded as a sound, pragmatic and effective
• storm wave height necessary to initiate transport of joint-bounded quantitative method applicable to any coastal area, in order to establish
boulders must have values between ~2 m and ~8 m and ~2 m and provenance/transport direction relationships between boulder deposits
~7 m, respectively, for those detected along the Punta Faraglione and their source.
and Punta Fanfalo coastal zones. In the case of the submerged scenar-
io, the transport of boulders at Punta Faraglione occurs when the Acknowledgments
wave height spans from few tens of centimeters up to ~11 m, whereas
the 6 blocks of Punta Fanfalo need storm wave height ranging from Authors thank Maurizio Gasparo for his help in classifying rock sam-
~1 m to ~9 m; ples. Radiocarbon measurements were carried out at the Centre for Dat-
• waves approaching the coastline are able to initiate the transport of all ing and Diagnostics (CEDAD), University of Salento, Lecce (Italy). The
surveyed boulders, as demonstrated by the comparison between the reader interested in model optimization and validation of forecast/
wave heights at the breaking point of the coastal zone computed by hindcast system for the Mediterranean Sea can refer to Mentaschi
hindcast numerical simulation model and the threshold wave heights et al. (2015, 2013). The hindcast dataset consists of grid points for which
calculated for each boulder using hydrodynamic equations; the data are provided in multicolumn ASCII format. Every column corre-
• boulders have been entrained and transported as consequence of sev- sponds to a different physical parameter (e.g. year, significant wave
eral storm events. This is stated on the basis of the lack of historical height, wavelength, direction, etc.) and every line is referred to consec-
tsunami that correlates with the time of boulders' detachment from utive time steps (1 hour steps from 01/01/1979 till 31/12/2015). This
the underwater environment and transport along coastal zones in- study has been funded by the Italian National Research Council (CNR)
ferred by radiocarbon ages of biogenic encrustations found on the in the frame of RITMARE Project.
boulder surfaces. Evidence of fresh impacts, dispersion of the A-axis We would like to thank Pedro JM Costa, an anonymous reviewer and
direction, and hydrodynamic equations also support this conclusion. the editor for their constructive comments.

Appendix A

Table A1
Site location, pre-transport setting, lithology, bulk density, dimensions, A-axis direction, volume and mass of all measured boulders. PFR: Punta Faraglione; PFN: Punta Fanfalo.
3
3
Boulder Site Pre-transport setting Lithology Density (g/cm ) A-axis (m) B-axis (m) C-axis (m) A-axis direction Vol. (m ) Mass (t)
1 PFR JJB CR 2.37 1.9 1.65 0.3 N125E 0.94 2.22
2 PFR SUB CA 2.23 1.9 1.4 0.85 N140E 2.26 5.04
3 PFR JJB CR 2.37 2 1.5 0.2 N120E 0.60 1.42
4 PFR JJB CA 2.10 2.1 2.1 0.4 N150E 1.76 3.70
5 PFR JJB CA 2.10 3 2 0.4 N160E 2.40 5.04
6 PFR JJB CA 2.10 2.2 1.8 0.3 N138E 1.18 2.49
7 PFR JJB CR 2.37 0.7 0.55 0.3 N140E 0.11 0.27
8 PFR JJB CA 2.23 2.5 1 0.55 N190E 1.37 3.06
9 PFR SUB CA 2.23 2.6 1.9 0.8 N160E 3.95 8.80
10 PFR JJB CA 2.23 2 1 0.5 N150E 1.00 2.20
11 PFR SUB CR 2.25 2 1.6 0.7 N190E 2.24 5.04
12 PFR JJB CA 2.23 1.5 1.3 0.5 N170E 0.97 2.17
13 PFR SUB CA 2.10 3.4 2 0.3 N160E 2.04 4.28
14 PFR SUB CA 2.23 2.4 2.1 0.85 N170E 4.28 9.55
15 PFR JJB CA 2.10 0.6 0.5 0.2 N165E 0.06 0.12
16 PFR JJB CA 2.10 1.6 1.5 0.4 N210E 0.96 2.01
17 PFR JJB CG 1.87 1.8 1.1 0.75 N150E 1.48 2.77
18 PFR JJB CA 2.10 2.4 1.3 0.4 N210E 1.24 2.62
19 PFR JJB CA 2.10 2.2 1.15 0.4 N110E 1.01 2.12
20 PFR JJB CA 2.10 0.75 0.75 0.2 N130E 0.11 0.23
21 PFR JJB CA 2.10 2.3 1.6 0.28 N130E 1.03 2.16
22 PFR JJB CA 2.10 2.6 1.6 0.3 N130E 1.24 2.62
23 PFR JJB CG 1.87 2.8 1.6 0.7 N132E 3.13 5.86
24 PFR JJB CA 2.10 1.8 1.7 0.26 N140E 0.79 1.67
25 PFR JJB CA 2.23 1.8 1.5 0.5 N160E 1.35 3.01
26 PFR SUB CA 2.10 2.4 1.7 0.3 N135E 1.22 2.57
27 PFR JJB CA 2.10 2 1.9 0.36 N130E 1.36 2.87
28 PFR JJB CA 2.10 1.8 1.6 0.3 N201E 0.86 1.81
29 PFR JJB CA 2.10 1.8 1.2 0.35 N205E 0.75 1.58
30 PFR JJB CA 2.10 1.2 1.1 0.4 N206E 0.52 1.10
31 PFR JJB CA 2.10 3.7 2.3 0.7 N144E 5.95 12.50
32 PFR JJB CA 2.10 1.7 1.2 0.23 N170E 0.46 0.98
33 PFR JJB CA 2.10 1.7 1.5 0.3 N168E 0.76 1.60
34 PFR SUB CG 1.87 1.6 1.3 0.3 N132E 0.62 1.16
35 PFR JJB CA 2.10 1.2 0.95 0.4 N184E 0.45 0.95
36 PFR JJB CA 2.10 2.25 1.6 0.7 N150E 2.52 5.29
37 PFR JJB CA 2.10 2.1 1.65 0.3 N200E 1.03 2.18
38 PFR JJB CA 2.10 2.8 1.1 0.35 N145E 1.07 2.26
39 PFR JJB CA 2.10 2 1.8 0.3 N142E 1.08 2.26
40 PFR SUB CA 2.23 2.5 1.4 0.5 N160E 1.75 3.90
41 PFR JJB CA 2.10 1.2 0.9 0.3 N140E 0.32 0.68
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