Sabatini volcanic complex
- Anno: 1993
- Autore/i: Di Filippo M.
- Catalogo: Distribuiti
- Argomento: Geologia
- ISBN:
- ISSN:
109 pp., 37 figg., 11 tabb. 2 cart. Geolog.pieg. Coll.
The present paper is framed into a wide and articulate research to which many Authors have shared in. The whole work consists in a monographic study concerning the more outstanding geological, geomorphological and volcanological aspects of the Mounts Sabatini area; this very interesting area has been subject - during rather recent times - to violent and complex volcanic phenomena. The aim of this study is to search into the groundwork of this part of Latium also to give valid support to some geological applicatory investigations, among which those connected with geothermal researches stand aut.
The Sabatini volcanic complex is placed in northern-central Latium about 20 km to the north of Rome and it is bordered to the north by the Vico volcano, to the west by the Mounts of Tolfa, to the south by the Tiber lower valley, and finally, to the east by the Mount Soratte-Mounts Cornicolani structure. This complex, together with the other Latian volcanic complexes, is part of the so-called "Roman Province", an alkali-potassic province developed - in a belt paralleling the Tyrrhenian coast - maily during the Pleistocene and that has been active up to recent times.
The volcanism - with an areal type activity and numerous eruptive centres widespread aver an area of about 1,500 km2 - caused the emplacement of a big amount of products prevailingly made of pyroclastic flows, hydromagmatic products, lava sheets, pyroclastic fall products; they gave rise to a wide plateau gently sloping from the central part of the complex towards the peripheral areas.
The landscape of the Sabatini area is characterized in its central part by a wide volcano-tectonic depression holding the Bracciano Lake and by a series of more strictly volcanic depressions (craters and calderas) some of which also hold small lakes, like those of Martignano and Monterosi. The highest relief is in the sector to the north of the Bracciano Lake and corresponds whith several scoria and lava cones reaching the maximum elevation (612 m a.s.l.) at Mount Rocca Romana. The other areas show wide low-relief structural surfaces often deeply cut by a series of perennial watercourses; among them particularly important are the Fosso di S. Martino and the Treia River in the northern sector, the Rio Cremera and the Fosso della Torraccia in the eastern sector, the Mignone River and the Arrone River in the werthern and soutern sector respectively.
The studied area has been abject of investigations carried out by different specialists on the stratigraphy of pre-volcanic sedimentary formations - outcropping or reached by drillings - on the strutigraphy of volcanic formations, on the geomorphological characteristics, on both the surface and deep tectonic arrangement of this area and on its geodynamic evolution.
Indice
PAG.
9 -
Preface - R. FUNICIELLO, E. LUPIA PALMIERI, M. PAROTTO
Basal Carbonate Succession - G. MARIOTTI
11 - 1 - Introduction
12 - 2 - Description of the sedimentary units
12 - - Formation of the Upper Triassic (60)
14 - - Calcare massiccio (60)
14 - - Corniola and Calcari selciferi (59)
15 - - Calcari with filaments (59)
16 - - Maiolica (59)
16 - - Marne a fucoidi (58)
16 - - Scaglia (58)
17 - 3 - Conclusions
18 - References
The Allochthonous Succession - G. CIVITELLI & L. CORDA
19 - 1 - Introduction
20 - 2 - Description of the outcropping units
20 - - The argillaceous-caleareolls succession (55)
21 - - "Argilliti varicolari manganesifere" lens (56)
21 - - "Pietraforte" lens (57)
22 - - Calcarcous-marly suecession (54)
23 - - Mignone lens (53)
23 - - Arenaceous formation (52)
24 - 3 - Reconstruction of the allochthonous succession
28 - 4 - Conclusions
28 - References
The Neoautochthonous Cycles (Plio-Pleistocene) - M.G. CARBONI, M.A. CONTI & D. ESU
29 - 1 - Introduction
29 - 2 - Description of the outcropping units
29 - - Sediments of the Lower (p.p.) and Middle Pliocene (51-50)
30 - - Sediments of the Upper Pliocene and Lower Pleistocene (49)
31 - - Sediments of the Middle and Upper Pleistocene (48)
31 - 3 - Conclusions
32 - References
Volcanic Units - D. DE RITA, R. FUNICIELLO, L. CORDA, A. SPOSATO & U. ROSSI
33 - 1 - Description of the outcropping units
33 - - Acid volcanites of the Tolfetano-Cerite and Manziate complexes (47)
33 - - "Peperini listati" Auct. pyroclastic flow units (46)
34 - - Pyroclastic fall products from Morlupo edifice (45-44)
38 - - Sacrofano lower pyroclaslic flow unit (42)
41 - - Morlupo pyroclastic flow unit (41)
44 - - "Red tuff wilh black scoria" pyroclaslic flow unit (40)
45 - - Pyroclastic fall products from Sacrofano and local scoria cones (38-36)
49 - - Sacrofano upper pyroclastic flow unit (35)
49 - - Pizzo Prato pyroclastic flow unit (34)
53 - - Vigna di Valle pyroclastic flow unit (33-32)
53 - - Bracciano pyroclastic flow unit (31-30)
55 - - Hydromagmatic products of the Vigna di Valle center (29-28)
55 - - The Vico units (27-26)
57 - - Pyroclastic fall deposits from local centers of the northern sector (Monterosi, Monte Guerrano, Monte Calvi, Trevignano) (25-23)
62 - - Hydromagmatic products from the Monterosi, V.S. Maria, S. Manino, Aguscello, Trevignano, Pizzopiede, Tre Querce craters (22-17)
63 - - Sacrofano hydromagmatic dry surge (16)
66 - - Pyroclastics products from local centers of the eastern side of the Sacrofano caldera (Monte S. Silvestro, Casale Nuovo, Monte Rosi, Fosso Cisterna e Li Porcini) (15)
66 - - Monte Razzano hidromagmatic deposits (14)
67 - - Lower hydromagmatic unit from Baccano (13)
68 - - Baccano pyroclastic flow unit (12)
68 - - Monte S. Angelo hydromagmatic deposits (11)
70 - - Hydromagmatic products of Polline, La Conca e Lagusiello (10-9)
71 - - Baccano intermediate hydromagmatic unit (8)
71 - - Baccano upper hydromagmatic unit (7)
73 - - Hydromagmatic products of the final stage from the activity of Stracciacappe, Le Cese and Martignano (6-4)
73 - 2 - Volcano-tectonic evolution of the Sabatini volcanic complex
76 - 3 - Conclusion
78 - References
Geomorphological Characteristics - A. BIASINI, G. BUONASORTE, S. CICCACCI, P. FREDI & E. LUPIA PALMIERI
81 - 1 - Introduction
83 - 2 - Morpho-tectonic evidences and volcanic forms
87 - 3 - Quantitative Geomorphology
88 - 4 - Relief energy
90 - 5 - Drainage density
92 - 6 - Statistical analysis of stream direction
93 - 7 - Remarks
94 - References
Gravimetric Study of Sabatini Area - M. DI FILIPPO & B. TORO
95 - 1 - Gravity anomalies
96 - 2 - Gravimetric profiles and two-dimensional models
98 - - Profile 1
98 - - Profile 2
98 - 3 - Conclusions
99 - References
101 - Geochronology - L.M. VILLA