Phipps , S. P.; Rahman, K. ; Omar, G. ; Feinstein, S.; Post, J. E. ; and 



MacPherson, G. J. "Tectonothermal Evolution of a Fossil Subduction 

 Zone, California Coast Ranges." Geological Society of America Abstracts 

 with Programs . 21 (1989): A314 (abstract). 



Plotkin, H. ; Buchwald, V. F. ; and Clarke, R. S. Jr. "The Port Orford 

 Meteorite Hoax." Meteoritics . 24 (1989): 316-317 (abstract). 



Post, J. E. "Crystal Structure Determinations of Three Synthetic Birnessite- 

 like Phases Using the Rietveld Method." Geological Society of America 

 Abstracts with Programs . 21 (1989): A73 (abstract). 



Post, J. E. "Crystal Structures of Todorokite and Layer Manganese Oxides." 

 American Chemical Society Abstracts . (1989) (invited abstract). 



Post, J.-E. and Bish, D. L. "Rietveld Refinement of the Coronadite 

 Structure." American Mineralogist . 74 (1989): 913-917. 



Post, J. E. and Bish, D. L. "Rietveld Refinements of Crystal Structures Using 

 Powder X-ray Diffraction Data." In Modern Powder Diffraction . (1989): 

 277-308. Bish, D. L. , and Post, J. E. , Editors. Washington, D. C. : 

 Mineralogical Society of America. 



Post, J. E. and Ross, D. R. "Rietveld Refinements of Two Coexisting 

 Ramsdellite Phases." EOS. 70 (1989): 352 (abstract). 



Post, J. E. and Veblen, D. R. "Crystal Structure Determinations for Na- , K- 

 and Mg-birnessites using TEM and the Rietveld Method." Clav Minerals 

 Society 26th Annual Meeting Abstracts . 55 (1989) (abstract). 



Post, J. E. and Veblen, D. R. "Crystal Structure Determinations of Three 

 Synthetic Birnessites using TEM and the Rietveld Method." American 

 Mineralogist . 75 (1990): 477-489. 



Roberts, A. C . ; Sturman, B. D. ; Dunn, P. J.; and Roberts, W. L. 



"Pararobertsite , Ca 2 Mn 3+ 3 (P0 4 ) 3 2 . 3H 2 0, a New Mineral Species from the Tip 

 Top Pegmatite, Custer County, South Dakota, and Its Relationship to 

 Robertsite." Canadian Mineralogist . 27 (1989): 451-455. 



Simkin, T. S. "Notable Volcanoes of the World." In AGI Data Sheets for 

 Geology in the Field, Laboratory, and Office . Third Edition (1990): 

 84.1-84.7. Compiled by J. T. Dutro, Jr.; R. V. Dietrich; and R. M. 

 Foose. Washington, D.C.: American Geological Institute. 



Sorensen, S. S. "Geochemical Evolution of High-T Hydrothermal Fluids in a 



Paleo-Subduction Zone." Goldschmidt Conference Abstracts . (1990): 82 

 (abstract) . 



. "Metasomatism and Migmatization of Garnet Amphibolites , Catalina 



Schist, California: Petrologic and Geochemical Evidence for Fluid- 

 Mediated Mass Transfer During Early Stages of Subduction." Proceedings 

 of the Third International Eclogite Conference . (1990) . 



. "Trace Element Effects of the Initiation of Subduction: Catalina 



Schist, Southern California." Geological Society of America Abstracts 

 with Programs . 21 (6)(1989): A216 (abstract). 



Sorensen, S. S. and Grossman, J. N. "Enrichment of Trace Elements in Garnet 

 Amphibolites from a Paleo-Subduction Zone: Catalina Schist, Southern 

 California." Geochemica et Cosmochimica Acta . 53 (1989): 3155-3177. 



Sylvester, P. J.; Grosman, L. ; and MacPherson, G. J. "Chemical Compositions 

 of Leoville and Vigarano Inclusions." Lunar and Planetary Science XXI . 

 (1990): 1231-1232 (abstract). 



Tamura, Y.; Koyama , M. ; and Fiske , R. S. "Hot Pyroclastic Debris Flow in the 

 Shallow Submarine Shirahama Group (Mio-Pliocene) , Japan." IAVCEI 

 General Assembly, New Mexico Bureau of Mines and Mineral Research 

 Bulletin . 131 (1989): 265 (abstract). 



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