Igneous Rock Photos  
Cochise College                  
Photos of Rocks  
Geology Home Page                       

Roger Weller
wellerr@cochise.edu

Igneous Rock Table 

                                 

Index
Number of photos: 538     Last edited:  4/17/18
 

glassy                                                                   

    obsidian  (48)

    pumice  (29)

    pitchstone  (13)

    perlite  (14)                                                                  
fine grained (aphanitic) 
    andesite  (29)

    basalt  (62)
    dacite  (2)
    diabase  (6)
    phonolite  (2)
    rhyolite  (30)
    trachyte  (4)
    tuff  (42)
    lithophysa  (21)

coarse grained (phaneritic)
    anorthosite  (4)                                                             
    aplite  (2)
    diorite  (33)                                     
    dunite  (2)                                                                             

    gabbro  (26)

    granodiorite  (3)                                                                                   

    granite  (66)
    kimberlite  (2)
    monzonite  (17)  
    peridotite  (6)      
    pyroxenite  (2)                    
    syenite  (10)
very coarse grained

    pegmatite  (36)

porphyritic

    porphyry  (19)
 

igneous structures   (10)


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Just credit photos to R.Weller/Cochise College.
copyright 2018-R.Weller