Phosphogenesis at the base of the Bonarelli Level from the Calabianca stratigraphic section (northwestern Sicily) was investigated using X-ray diffraction, scanning electron microscopy, X-ray ...fluorescence, and stable-isotope mass spectrometry. The anoxic event onset is marked by high P
2O
5tot concentrations related to the presence of authigenic carbonate-fluorapatite. This mineral is poorly crystallized and occurs in three different forms: (i) fish debris locally showing evidence of re-crystallization, (ii) phosphatically cemented layers, and (iii) dense aggregates of microcrystals. Petrographic features are indicative of a microbial genesis for the carbonate-fluorapatite. Conversely, this evidence is lacking in phosphate from the upper part of the section, where lower P
2O
5tot concentrations are linked to the presence of sparse unaltered hydroxy-apatite fish debris. Distribution patterns of rare earth elements (REE) throughout the Calabianca section, the Ce anomaly and V/(V
+
Ni) values suggest fluctuating redox conditions during phosphogenesis. These conditions triggered the iron redox cycle that operated as phosphate sink-switching mechanism. Depth profiles of P mass accumulation rate and C-isotope compositions highlight the decoupling of P and C-org cycles, whose global implication is confirmed by correlation with the same proxies from other well known stratigraphic sections, which embody sedimentary expressions of the Oceanic Anoxic Event 2 (OAE2).
25 - the gypsies on board the coach
24 - youth hostel in Caltanissetta
23 - castle of Lombardy in Enna
22 - Lake Pergusa
21 - framing of the scenes of the Roman mosaics
20 - Roman Imperial villa in ...Piazza Armerina
19 - Ragusa
18 - Greek theater of Syracuse
17 - view of Syracuse
15 - orange groves with ripe fruits
14 - overview on Centuripe
13 - country landscape from the racing coach
11 - Greek theater of Taormina
10 - Taormina Bay
1 - a coach runs along a Sicily road
6 - panoramic views of the Sicilian coast from the coach in the running
3 - panoramic views of some famous locations in the region: Porticello, Bagheria, Porto Zafferano, Solunto
16 - rowing boat with gypsies on board along the CIANE River
The documentary illustrates a tourist itinerary in Sicily that touches the main historical, artistic and bathing resorts of the island.
12 - panoramic views of the beaches and coast of the island
2 - shots of the pupils of a tourism school as they travel on the coach
9 - the Orion fountain in Messina
8 - the Duomo of Messina
7 - the Strait of Messina
5 - Duomo di Cefalù
4 - glimpses of the landscape
36 - Castellammare del Golfo
35 - the gypsies on board the racing coach
34 - the temple of Segesta
33 - coach in the running
32 - the gypsies on Mount Erice
31 - medieval churches in Erice
30 - Erice castle
29 - exit of fishing boats from the port of Selinunte
28 - Selinunte
27 - view of Agrigento
26 - the valley of the temples of Agrigento
Il documentario illustra un itinerario turistico in Sicilia che tocca le principali località storiche, artistiche e balneari dell'isola.
1 - un pullman corre lungo una strada della Sicilia
2 - inquadrature degli allievi di una scuola di turismo mentre viaggiano sul pullman
3 - vedute panoramiche di alcune famose località della regione: Porticello, Bagheria, Porto Zafferano, Solunto
4 - scorci del paesaggio
5 - Duomo di Cefalù
6 - vedute panoramiche della costa siciliana dal pullman in corsa
7 - lo stretto di Messina
8 - il Duomo di Messina
9 - la fontana di Orione a Messina
10 - baia di Taormina
11 - teatro greco di Taormina
12 - vedute panoramiche delle spiagge e della costa dell'isola
13 - paesaggio di campagna dal pullman in corsa
14 - panoramica su Centuripe
15 - aranceti con i frutti maturi
16 - barca a remi con i gitanti a bordo lungo il fiume Ciane
17 - veduta di Siracusa
18 - teatro greco di Siracusa
19 - Ragusa
20 - villa imperiale romana di piazza Armerina
21 - inquadrature delle scene dei mosaici romani
22 - lago di Pergusa
23 - Castello di Lombardia ad Enna
24 - ostello della gioventù a Caltanissetta
25 - i gitanti a bordo del pullman
26 - la Valle dei Templi di Agrigento
27 - veduta di Agrigento
28 - Selinunte
29 - uscita dei pescherecci dal porto di Selinunte
30 - castello di Erice
31 - chiese medievali ad Erice
32 - i gitanti sul monte Erice
33 - pullman in corsa
34 - il tempio di Segesta
35 - i gitanti a bordo del pullman in corsa
36 - Castellammare del golfo
