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also vary in size. The most compact varieties of 

 quartz rock, and some varieties of argillaceous 

 schist, present examples of these textures. 



It may pass into an elongated crystalline, and 

 distinct, or into a fibrous, or a scaly texture. It 

 may also be intermixed with distinct examples of 

 these. 



BLADED. 



This, or the flat prismatic texture, arises from 

 the interlacement of prisms; and as it passes 

 from the granular texture on the one hand, so it 

 passes into the fibrous on the other. The modi- 

 fications which it may present, are so analogous 

 to those of the following division, that they do 

 not stand in need of enumeration. It occurs in 

 some hornblende and actinolite schists. 



FIBROUS. 



This texture results from the condensed ag- 

 gregation of minute irregular prisms. 



It may be more or less distinct, or it may con- 

 sist of parts of various magnitude. 



The fibres are sometimes continuous for a 



