van Bergen, Manfred J. (1980) Grandidierite from aluminous metasedimentary xenoliths within acid volcanics, a first record in Italy. Mineralogical Magazine, 43 (329) 651-658 doi:10.1180/minmag.1980.043.329.15

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	*Washington, Henry S. (1896) Italian Petrological Sketches. II. The Viterbo Region. The Journal of Geology, 4 (7) 826-849 doi:10.1086/607621*	Journal (article/letter/editorial)
	PETROLOGICAL ITALIAN II. THE VITERBO SKETCHES. REGION. Bibliography.-The writings of the early...pamphlet, entitled I Vulcani Cimini e Vulsinii (Viterbo, 1877), which is out of print and very rare. It...of Italy. Topograpzy.-The Viterbo region lies a few kilometers southeast of Lake Bolsena, Viterbo being...resembles in many respects the Bolsena region. East of Viterbo and in the northern part of the region lies the...above the sea and about 800 above the plateau of Viterbo. Connected with this and forming part of the same
	*(2013) Il Cercapietre* 1-2. Gruppo Mineralogico Romano**	Journal (issue)
	unitamente all’impegno nella ricerca mineralogica nel Lazio, il momento di massima collaborazione con il Museo...Cercapietre, è conosciuta, anche oltre i confini del Lazio e nazionali, sia per la varietà dei minerali e la...peraltro molto ben descritto nel libro “I minerali del Lazio” (Stoppani e Curti, 1982), può essere identificato...Specie mineralogiche scoperte per la prima volta nel Lazio – Il Cercapietre, Notiziario del Gruppo Mineralogico...minerals from the Sacrofano caldera, Rome, Latium, Italy – Mineral Observer, Mineralogical Almanac, 13c,
	*Preller, Charles S. Du Riche (1923) Italian Mountain Geology* Vol. 3 - Central and Southern Italy. Wheldon & Wesley, London.**	Book (volume)
	GEOLOGY 4 PART CENTRAL AND Ili SOUTHERN ITALY BY C. § DU RICHE PRELLER, M.A, Ph.D, AMICE., MLEE...MOUNTAIN BARTGG CENTRAL AND GEOLOGY. Ut SOUTHERN ITALY. OTHER 1877. 1880. 1881. 1893. 1893. 1893. 1893...(The Moraine Walls and Lake Basins of Northern Italy. Piedmontere Alps, Ligurian Apennines, Carrara Mountains...idem. The Ancient Sea and Lake Basins of Central Italy: The Sub- the Geol. Structure of Elba.) “ Journ...VOLCANOES OF CENTRAL AND ABRUZZI, SOUTHERN ITALY. BY bea eee hsp SIBNGRT LC RE O2 ett ed ed nel
	van Bergen, Manfred J. (1980) Grandidierite from aluminous metasedimentary xenoliths within acid volcanics, a first record in Italy. Mineralogical Magazine, 43 (329) 651-658 doi:10.1180/minmag.1980.043.329.15	Journal (article/letter/editorial)
	xenoliths within acid volcanics, a first record in Italy MANFRED J. VAN BERGEN Department of Structural...volcanic rocks from Mt. Amiata and Mt. Cimino, central Italy. Physical and electron microprobe data for the grandidierites...volcanics of southern Tuscany and northern Latium, Italy. The volcanic rocks are part of two PliocenePleistocene... I). Both belong to the TuscanLatian Magmatic Province, which is characterized by extrusive and intrusive...potassic alkaline products of the Roman Magmatic Province. Chemical, petrological, and volcanological data
	Washington, H.S. (1903) Chemical analyses of igneous rocks published from 1884 to 1900, with a critical discussion of the character and use of analyses. Professional Paper 14. US Geological Survey doi:10.3133/pp14	Report (issue)
	titaniferous augite are present; P8O5 , when there is any apatite, and ZrO8 if there is considerable zircon or eudialyte...analysis of the ciminite of Fontana Fiescoli, near Viterbo.** The mode, as calculated from this analysis,...minerals as sodalite, fluorite, much biotite or apatite, pyrite or pyrrhotite, in which Cl, F, or S has...tawite, and the hauynophyr of Melfi, P.,O5 in the apatite-syenites of Finland, or Cr2O3 in many dunites....BATING. 65 Austria, Hungary, Switzerland, and Italy; and an Eastern zone, embracing Russia (except Finland)
	Washington, H.S. (1917) Chemical analyses of igneous rocks published from 1884 to 1913, inclusive, with a critical discussion of the character and use of analyses. Professional Paper 99. US Geological Survey doi:10.3133/pp99	Report (issue)
	augite, or magn.etite; P 20 5 , if it contains apatite, nondetermination will not seriously affect the...analysis of the ciminite of Fontana Fiescoli, near Viterbo. 1 The mode, as calculated from this analysis/...·importance; or it sodalite, fluorite, much biotite or apatite, pyrite or may be distributed among several constituents...general, tawite, and haiiynophyre, P 20 5 in the apatite syenites the 1nore constituents detel'lnined the...Galicia, Hungary, Bosnia, ~eyrol. Switzerland. Italy: Lombardy, Piedmont: Emilia, Tuscany (Elba), Rome

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Apatite from Bagnaia, Viterbo, Viterbo Province, Lazio, Italy

Apatite from
Bagnaia, Viterbo, Viterbo Province, Lazio, Italy