Digital Gallery of Paleochemical Specimens and Thin-sections (DiGPaST)

[To be added.]

Brachiopod Shells

This web-page links to digital images of black & white photomicrographs of brachiopod shells viewed in plane light and cathodoluminescence. Eventually these images will be incorporated within the HERMES database for sedimentary geochemistry in the CHRONOS system.  Shells that are well-preserved in hand sample are embedded in epoxy and cut longitudinally with a thin-blade Isomet saw. Shells are then thin-sectioned and photographed for preservation of microstructure and luminescence under a petrographic microscope with a Technosyn Model 8200 MK II cathodoluminescence stage (Grossman et al., 1993). These photomicrographs have been used to screen Late Paleozoic brachiopod shells for stable isotopic analyses (C, O, S, and Sr) . Sample localities include the U.S. Mid-Continent (Kansas, Illinois, Iowa, Missouri, Nebraska, Oklahoma, Texas), the southwest and western U.S. (New Mexico, Nevada), Canada, and Russia (Moscow Basin and Ural Mountains).

The photos have been sorted based on

• Location
• Type of fossil (not yet available)
• Publication in which the data appear

Specimen and File Names

Location (state), sample number, sample species:
    * TX001a_neop.jpg
         o Texas, sample 001a, Neophricodothyris

Location (state), location (unit), sample interval, sample species, sample number:
    * TX_LW103comA.jpg
        o Texas, Lower Winchell, interval 103, Composita . . ., sample A

In additional, all specimens will be listed with SESAR .

Shell Images by Locality and Publication

• Australia
• Russia  ( Mii et al., 2001 )
• U.S.A.
  
• Illinois
• Mii et al. (1999)
• Iowa
  
• Mii et al. (1999)
• Kansas
• Grossman et al. (1993)
• Mii et al. (1999)
• Missouri
• Mii et al. (1999)
• Nebraska
  
• Mii et al. (1999)
• Nevada (Jones, unpublished)
• New Mexico
• Grossman et al. (1993)
• Mii et al. (1999)
• Oklahoma
• Mii et al. (1999)
• Texas
  
• Grossman et al. ( 1991)
  
• Grossman et al. ( 1993)  
• Mii et al. (1999)

Publications in which data from these specimens appear include:

Mii, H., Grossman, E.L. , Yancey, T.E., Chuvashov, B., Egorov A., 2001. Isotope records of brachiopod shells from the Russian Platform¡ªevidence for the onset of mid-Carboniferous glaciation. Chemical Geology, v. 175, p. 133-147 (invited; Special IGCP Project #386 issue) pdf . Figure 6 / Figure 7 / Appendices ( pdf , Word )

Mii, H-S., Grossman, E.L. , and Yancey, T.E., 1999. Carboniferous isotope stratigraphies of North America: Implications for Carboniferous paleoceanography and Mississippian glaciation: Geol. Soc. America Bull., v. 111, p. 960-973. pdf / Figure 7/ Figure 8 / Appendix Fig. 1 / Appendix I ( text )

Mii, H-S., Grossman, E.L ., and Yancey, T.E., 1997. Stable carbon and oxygen isotope shifts in Permian seas of West Spitsbergen-global change or diagenetic artifact? Geology, v. 25, p. 227-230. pdf / Figure 3 / Appendix I ( pdf  , text ) / Appendix II ( pdf , text )

Grossman, E.L. , Mii, H., Zhang, C., and Yancey, T.E., 1996. Chemical variation in Pennsylvanian brachiopod shells-Diagenetic, taxonomic, microstructural, and seasonal effects . Jour. Sed. Research, v. 66, p. 1011-1022. pdf / Figure 10 / Appendix ( Word 6.0 , text )

Mii, H-S., Yancey, T.E., and Grossman, E.L ., 1996. Stable isotope variations in Late Pennsylvanian brachiopods from north New Mexico. New Mexico Geological Society Guidebook, 47th Field Conference, p. 189-197.

Mii, H., and Grossman, E.L ., 1994. Late Pennsylvanian seasonality reflected in the 18 O and elemental composition of a brachiopod shell: Geology, v. 22, p. 661-664. pdf / Figure 2

Grossman, E.L., Mii, H-S., and Yancey, T.E., 1993. Stable isotopes in late Pennsylvanian brachiopods from the United States: Implications for Carboniferous paleoceanography: Geol. Soc. America Bull., v. 105, p. 1284-1296. pdf / Appendix I ( html , text , pdf ) / Appendix II ( html , text , pdf ) / Appendix III ( text )

Grossman, E.L., Zhang, C., and Yancey, T.E., 1991. Stable isotope stratigraphy from brachiopods in Pennsylvanian (Upper Carboniferous) shales of Texas: Geol. Soc. America Bull., v. 103, p. 953-965. Appendix