#  Matthew Miller 

Former Undergraduate Research Assistant

 

 

 



   ![M_Miller](/sites/g/files/omnuum8991/files/styles/hwp_4_5__480x600/public/johnstonlab/files/johnstonlabpic_1.jpg?itok=NDRi92t9) 

 



 





 

My work mainly focuses on establishing novel mineral proxies to track sulfur cycle dynamics in deep time, notably carbonate-associated sulfate (CAS). This system, alongside the robust yet infrequent barite record, potentially represents a powerful way to track sulfur and oxygen isotope behavior in order to constrain marine chemistry in the past. Additionally, I have started some culture work with the sulfate-reducing bacterium Desulfovibrio vulgaris, and am currently investigating the evolution of its isotope-fractionating metabolism.

 

 

 





 

 

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     [Gone, But Not Forgotten...](/faculty/former)