260 



Subsurface Geologic Methods 



Ca rbonates 



Otgrees Ctnligrode 

 SOO 700 



LOCAL I T Y 



Cgmb«flon0. Enjlontf I T 



lourium. Greece . I 1 -f- 



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Oevonshne. Englond I j h 



1 I Sidenfe 



eurl.nqlon Mine. 



Lohe Co, Colo 



M.oik.U'Ol* I i *- 



Si E»'e«ne. S»irri» I H 



Cnsmouni, ^ronet 



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' ■ I ' ' ' I ' I ' I ■ I ' I ' I ■ ' ' I 

 100 300 500 700 900 MQO 



0*g'««» C*n<iarodt 



Figure 110. Thermal curves for a number of common rhombohedral carbonates. 



