TY  - SER
AU  - Ryer,T
AU  - Phillips,R.E
AU  - Bohor,B
AU  - Pollastro,R
TI  - 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
SN  - 00167606
SN  - 00167606
KW  - Stratigraphie
KW  - Roche volcanique
KW  - Volcanisme
KW  - Crétacé sup
KW  - Tertiaire
KW  - Sédimentation fluviatile
KW  - Etats Unis
KW  - Utah
N1  - bibliogr. p. 586
ER  -