Wenrich-Verbeek, Karen <br/><br/>
The petrogenesis and trace-element geochemistry of intermediate lavas from Humphreys Peak, San Francisco volcanic field, Arizona 

<br/><br/> <Donation ORSTOM> 
<br/><br/>bibliogr. p. 128-129 
<br/><br/><label>ISSN: </label>00401951 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pétrographie<br/>Elément trace<br/>Géochimie<br/>Volcanisme<br/>Composition alcaline<br/>Roche volcanique<br/>Tertiaire
<br/><br/><label>Subjects--Index Terms: </label>Etats Unis  Arizona