Monte Somma is an igneous, arc-shaped mountain that represents the remnants of an older volcanic cone destroyed in a cataclysmic event in 79 d.c. (when Pompei and Ercolano were destroyed and where Plinius the Old died trying to study the eruption). Mt. Vesuvius is the current cone over the vent. Last eruption 1944.
N.B.: The "guarinite" of Somma-Vesuvius Complex is an epitaxy of hiortdhalite, wohlerite and låvenite (Russo & Punzo, 2004 and references herein).
Refs.:
- Monticelli, T., Covelli, N. (1825): Prodromo della Mineralogica Vesuviana, Napoli
- Rose. G. (1823): Über den Feldspat, Albit, Labradorit und Anorthit, Annalen der Physik und Chemie, Vol. 73/NF-43, 175-208
- Haidinger, W. (1827): Über den Davyn, eine neue Mineralspecies, Annalen der Physik und Chemie, Vol. 87/F2-11, 470-474
-Scacchi, A., 1851: Ueber den Humit (Humit, Klinohumit, Chondrodit) und den Olivin des Monte Somma, Annalen der Physik und Chemie, Erg. Bd. III, 161-187, J.C. Poggendorff, Leipzig
-Scacchi, A., 1851: Notiz über den Sommit (Nephelin), Mizzonit und Mejonit, Annalen der Physik und Chemie, Erg. Bd. III, 478-479, J.C. Poggendorff, Leipzig
-vom Rath, G., (1869): Orthit vom Vesuv, Annalen der Physik und Chemie, Vol. 214, 492ff
-vom Rath, G., (1869): Krystallinischer Lasurstein vom Vesuv, Annalen der Physik und Chemie, Vol. 214, 491
-Rath, G. vom, 1871: Über die Winkel des Monticellits, Annalen der Physik und Chemie, Erg. Bd. V, 434-438, J.C. Poggendorff, Leipzig
-Rath, G. vom, 1871: Über das Kristallsystem des Humits, Annalen der Physik und Chemie, Erg. Bd. V, 321-413, J.C. Poggendorff, Leipzig
- Rath, G. vom, (1874): Glimmerkristalle (Biotit) vom Vesuv, Annalen der Physik und Chemie, Erg. Bd. VI, 366-372, J.C. Poggendorff, Leipzig
- Zambonini, F., & Prior, G. T., (1909): On the identity of Guarinite and Hiortdahlite. Mineralogical Magazine, Vol. 15: 247-259.
-Carati, M., (1982): Guida alla mineralogia vesuviana. Bologna, Ed. Calderini.
- Parodi, G., Ballirano, P., Maras, A. (1996): Afghanite from Mt Vesuvius: A Rediscovery, The Mineralogical Record, Vol. 27, 109-114
-Russo, M., Punzo, I., (2004): I minerali del Somma-Vesuvio. AMI (Italian Micromineralogical Association), Ed., Cremona.
For an old but interesting article see:
http://www.minsocam.org/msa/collectors_corner/arc/vesuviusii.htm
and:
http://www.geocities.com/CapeCanaveral/Hangar/7679/som-ves.htm
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Map Reference: 40°50'25"N , 14°25'12"E
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