Brenchley, Pat J. <br/><br/>
High-resolution stable isotope stratigraphy of Upper Ordovician sequences: constraints on the timing of bioevents and environmental changes associated with mass extinction and glaciation 

 - Boulder, CO  Geological Society of America  January 2003 
 - pp. 89-104  ilus. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ESTRATIGRAFÍA<br/>EXTINCION MASIVA<br/>GLACIACION<br/>ISOTOPOS ESTABLES<br/>ORDOVICICO<br/>PALEOAMBIENTES
<br/><br/><label>Subjects--Geographic Terms: </label><br/>ESTONIA<br/>MAR BALTICO