The New Encyclopaedia Britannica, Volume 8 |
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Page 61
... rocks formed by contact meta- morphism are limited in extent and closely associated with an igneous intrusion . Pres- sure gradients are absent and fluid effects are dependent on the type of intrusion . A typi- cal resultant rock has a ...
... rocks formed by contact meta- morphism are limited in extent and closely associated with an igneous intrusion . Pres- sure gradients are absent and fluid effects are dependent on the type of intrusion . A typi- cal resultant rock has a ...
Page 602
... rocks , particularly nephelinesyenites and nepheline- Nepheline from Litchfield , Maine By courtesy of the Field Museum of Natural History , Chicago , photograph John H Gerard - EB Inc gneisses . It occurs in beautiful crystal form with ...
... rocks , particularly nephelinesyenites and nepheline- Nepheline from Litchfield , Maine By courtesy of the Field Museum of Natural History , Chicago , photograph John H Gerard - EB Inc gneisses . It occurs in beautiful crystal form with ...
Page 920
... rocks . Minor element concentrations can also be used to derive concentrations in the parent liquid ; they also may be used to a limited extent as an indicator of crystallization en- vironment . The ultrabasic rocks dunite and ...
... rocks . Minor element concentrations can also be used to derive concentrations in the parent liquid ; they also may be used to a limited extent as an indicator of crystallization en- vironment . The ultrabasic rocks dunite and ...
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