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JOURNAL MINERALOGICAL SOCIETY OF AMERICA 42L of the depositing solution for all might be depositedat the same temperature or at least within a few degreesof each other The material studied apparently gives striking support to the experimental work of the authors cited above provided of course that the interpretation of the black powder as teing originally melnikovite is correct The writer inclines to the view that the solutions are of magmatic origin The cobalt nickel copperdeposits of Fredricktown and Mine La Motte are only a few miles away The former which are within a mile of this deposit contain enormousquantities of marcasite along with the other sulphides and this deposit may well be connected with them in origin In fact this deposit has a structural position in the dolomite adjacent to two outcrops of igneous rocks which are pre Cambrian that resembles to a marked degreethe mode of occurrenceat Fredricktown It may be added that pyrite is abundant in the granites and granite porphyries of the St Francis mountains to the west As far as could be determined from the literature this is the first instance where the amorphous iron disulphide may have been deposited by hot solutions along with the other polymorphous forms of the iron disulphide and this gives added interest to the deposit ADDITIONAL DATA ON THE PROPERTIES OF PUMPELLYITE AND ITS OCCURRENCE IN THE REPUBLIC OF HAITI WEST INDIES1 W S BuneeNK U S Geolog ical Suraey In l92l during a geological reconnaissancein the Republic of Haiti undertaken by the Haitian government in cooperation with the United States Geological Survey 2 Dr J S Brown and the writer collected a cobble of a peculiar amygdaloidal basalt from the bed of the Limb6 River at Limb6 in northern Haiti the basalt was not greatly unlike many of the older basaltic rocks of this region but the amygduleswere very noticeableand abundant most of them being lined with white albite and the central part filled with greenish yellow iron rich epidote and a



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