. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography THIN C2) SECTION I ! I iBi A iBi "•'y iakjiigffi-jtMd \„..^ ^^!\''Lk ULTRATHIN 13) SECTION b" a" b" I I • I F^Y^^^^siT^^^i^sass^;^;^^--":^^^ \,^,^:^^r^^ A^k^^i^^>^>^ \ h c a f e d 9 J. PROJECTED VIEW OF ULTRATHIN SECTION (3) Figure 64.—Representation of various cross sections of clay sample thin sections from thick to ultratliin. The above discussion points out the obvious, important factors one should consider whe
. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography THIN C2) SECTION I ! I iBi A iBi "•'y iakjiigffi-jtMd \„..^ ^^!\''Lk ULTRATHIN 13) SECTION b" a" b" I I • I F^Y^^^^siT^^^i^sass^;^;^^--":^^^ \,^,^:^^r^^ A^k^^i^^>^>^ \ h c a f e d 9 J. PROJECTED VIEW OF ULTRATHIN SECTION (3) Figure 64.—Representation of various cross sections of clay sample thin sections from thick to ultratliin. The above discussion points out the obvious, important factors one should consider when interpreting electron pho- tomicrographs and image enhancement data and graphics of clay fabrics. However, through the study and examination of hundreds of ultrathin sections and photomicrographs of clay fabric, it became clear to the writer that the various factors adversely affecting gray level variations of particle images were virtually insignificant in the final analyses. Obviously clay particles are considerably more electron dense than the SPURR embedding medium which also can vary slightly in thickness lendering a range of low gray level densities. Particle boundaries are clearly discernable despite the various factors that can affect the final gray level densities. Again, the various factors that affect the gray level density of the particles are significantly minimized when sections are made ultrathin and solid-to-void ratios appear to be well represented in ultrathin sections. The initial study of image enhancement techniques as applied to the analysis of clay fabric has revealed a unique means of evaluating various aspects of clay particle and particle-voids relationships. The technique indicates that the sediment investigated has remained essentially "micro- .:Ui:Ui. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perf
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