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Fosso di Monte Acuto, Giuliano di Roma, Frosinone Province, Latium, Italy

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Latitude & Longitude (WGS84): 41° 33' 42'' North , 13° 12' 57'' East
Latitude & Longitude (decimal): 41.5615695028, 13.2157881267
Name(s) in local language(s):Fosso di Monte Acuto, Giuliano di Roma, Frosinone, Lazio, Italia

Pyroclastics (lahars), outcropping in the valley between Monte Acuto and Monte Caccume, originated from phreatomagmatic eruptions and consisting of aggregates of carbonate fragments and lava xenoliths (containing pyroxenes, biotite, garnets, olivine and feldspars) in an ashy matrix cemented by calcite and zeolites (De Gennaro & Franco, 1971). Along the bottom of Fosso di Monte Acuto, the lahars have been highly weathered to form an unlithified reddish unit with a halloysite-10 Å matrix. Most of the minerals from the lahars have been only slightly altered, the exception being biotite, which often shows a partial or complete transformation to vermiculite and, rarely, extreme alteration to smectite (De Gennaro & Franco, 1975; Pozzuoli et al., 1992).

Mineral List

6 valid minerals.

This page contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


- Angelucci A., Devoto G. (1966): Geologia del Monte Caccume (Frosinone). Geologica Romana, 5, 177-195.
- De Gennaro M., Franco E. (1971): Studio preliminare sulle vulcaniti dei Monti Ernici e della Media Valle Latina. Rend. Accad. Sc. fis. mat. Soc. Naz. Sc. Lett. Arti Napoli, ser. 4, 38, 215-242.
- De Gennaro M., Franco E. (1975): Su alcuni casi di alterazione della biotite in vermiculite. Rend. Acc. Sc. Fis. Mat., Soc. Naz. Sc. Lett. Arti in Napoli, ser. 4, 42, 1-18.
- De Gennaro M., Franco E., Langella A., Mirra P., Morra V. (1982): Le zeoliti delle piroclastiti dei Monti Ernici. La phillipsite dei Peperini. Acta Naturalia Ateneo Parmense, 18, 4, 163-173.
- Stoppani F.S., Curti E. (1982): I minerali del Lazio. Editoriale Olimpia, Firenze, 291 pp.
- Rosaspina C. (1985): Ritrovamento di zeoliti nelle piroclastiti dei Monti Ernici. Riv. Mineral. Ital., 9, 4 (4-1985), 147.
- Pozzuoli A., Vila E., Franco E., Ruiz-Amil A., De La Calle C. (1992): Weathering of biotite to vermiculite in Quaternary lahars from Monti Ernici (Central Italy). Clay Minerals, 27, 175-184.

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