Ryer, T <br/><br/>
Use of altered volcanic ash falls in stratigraphic studies of coal-bearing sequences :  an example from the Upper Cretaceous Ferron Sandstone Member of the Mancos Shale in central Utah 

<br/><br/>bibliogr. p. 586 
<br/><br/><label>ISBN: </label>00167606 
<br/><br/><label>ISSN: </label>00167606 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Stratigraphie<br/>Roche volcanique<br/>Volcanisme<br/>Crétacé sup<br/>Tertiaire<br/>Sédimentation fluviatile
<br/><br/><label>Subjects--Index Terms: </label>Etats Unis  Utah