The Pegmatyte Veins of Pala— Waring, 
359 
more resisting character of the granite on the east wall, 
making a distinct ridge about ten inches high and two feet 
wide. A slight pegmatitic structure is shown in the west 
side of the vein. The whole width consists of quartz, feld- 
spar, and muscovite. A little fibrolite is developed near the 
center of the vein, — a mineral not known to occur in any 
other vein of the region. A few pockets have been found 
here, and some fine specimens of quartz enclosing black 
tourmalines taken out, but no gems. 
About two miles southwest of Fallbrook station, in 
Temecula canyon there is a dyke of hypersthene dioryte 
and in it a pegmatitic vein several feet wide. This shows 
a graphic structure on the hanging-wall side and a banded 
garnet quartzyte on the footwall side. Muscovite and 
black tourmaline are developed to considerable extent bu: 
otherwise the vein is not mineralized. 
Structure of the Pegmatyte Veins. This pegmatic struc- 
ture is best developed in an area about one and a half 
miles wide and four miles long, lying northeast of Pala, as 
shown in fig. 2. This consists of a noryte boss within the 
Fig 2 Conf-our map of Pala Region, 
Scale 
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