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330 W.F. Fontaine—Minerals in Amelia County, Va. 
Art. XXXIII.—Notes on the Occurrence of certain Minerals in 
Amelia County, Virginia; by Wm. F. FonTAINE. 
few years for the purpose of obtaining mica. This work has 
brought to light a number of interesting, and some very rare 
minerals. I have several times visited this locality and noted 
the occurrence of the minerals found there. It is my pure 
feldspar which serves as a gangue in which the masses al 
crystals of mica occur in a porphyritic manner. Some 
usually marked by the occurrence of the veins of giganule 
0 
tances. They occur more commonly “en echelon,” sometimes 
overlapping each other. Some of them, over limited distance 
at least, seem at one time to have been open crevices. e 
have remained undisturbed since their first filling, but others 
have evidently been reopened or disturbed more than once 
and have received new materials. 
he feldspar, mica and quartz, the essential minerals of 
these deposits, appear to have pretty constantly consolidated 
and crystallized in the same order of succession. The mica 
was the first to crystallize; the feldspar came next; and the 
quartz was the last to assume the solid form. 
