Changes

=====Optical Microscope=====

=====Optical Microscope=====

Optical microscopy can, for example, inform about the not-always-so-obvious origin of quartz grains<ref name=Mllkn2013 /><ref name=Schbr1996>Schieber, J., 1996, Early diagenetic silica deposition in algal cysts and spores: A source of sand in black shales?: Journal of Sedimentary Research, v. 66, p. 175–183.</ref><ref> Milliken, K. L., W. L. Esch, R. M. Reed, and T. Zhang, 2012a, [https://archives.datapages.com/data/bulletns/2012/08aug/BLTN11129/BLTN11129.HTM Grain assemblages and strong diagenetic overprinting in siliceous mudrocks, Barnett Shale (Mississippian), Fort Worth Basin, Texas]: AAPG Bulletin, v. 96, p. 1553–1578.</ref>, the formation history of small spots of cherty-looking material<ref name=Mllknea2007>, depositional parameters<ref name=Schbr1999 /><ref name=Lzrea2015a /><ref name=Lzrea2015b /><ref name=McqkrTlr1996 /><ref>Wilson, R., and J. Schieber, 2014, Muddy prodeltaic hyperpycnites in the Lower Genesee Group of Central New York, USA: Implications for mud transport in epicontinental seas: Journal of Sedimentary Research, v. 84, p. 866–874.

Optical microscopy can, for example, inform about the not-always-so-obvious origin of quartz grains<ref name=Mllkn2013 /><ref name=Schbr1996>Schieber, J., 1996, Early diagenetic silica deposition in algal cysts and spores: A source of sand in black shales?: Journal of Sedimentary Research, v. 66, p. 175–183.</ref><ref> Milliken, K. L., W. L. Esch, R. M. Reed, and T. Zhang, 2012a, [https://archives.datapages.com/data/bulletns/2012/08aug/BLTN11129/BLTN11129.HTM Grain assemblages and strong diagenetic overprinting in siliceous mudrocks, Barnett Shale (Mississippian), Fort Worth Basin, Texas]: AAPG Bulletin, v. 96, p. 1553–1578.</ref>, the formation history of small spots of cherty-looking material<ref name=Mllknea2007 />, depositional parameters<ref name=Schbr1999 /><ref name=Lzrea2015a /><ref name=Lzrea2015b /><ref name=McqkrTlr1996 /><ref>Wilson, R., and J. Schieber, 2014, Muddy prodeltaic hyperpycnites in the Lower Genesee Group of Central New York, USA: Implications for mud transport in epicontinental seas: Journal of Sedimentary Research, v. 84, p. 866–874.

</ref>, and sequence-stratigraphic packaging and parasequence stacking patterns<ref name=Lzr2007 /><ref name=Lzrea2015a /><ref name=Lzrea2015b /><ref>Schieber, J., and O. R. Lazar, 2004, Devonian black shales of the eastern U.S.: New insights into sedimentology and stratigraphy from the subsurface and outcrops in the Illinois and Appalachian basins: Indiana Geological Survey Open File Study 04-05, 90 p.</ref>. For example, Schieber<ref name=Schbr1996 /> was able to show that diagenetic infilling of algal cysts produced sand-size diagenetic quartz grains that are easily mistaken for detrital grains, which can lead to erroneous interpretations of mudstone-associated sandstone beds. This avenue of research was extended further when in distal mudstones, large proportions of silt-size (and presumably detrital) quartz grains were linked to early diagenetic processes as well<ref name=Schbrea2000 />. Chertlike grains may initially suggest a diagenetic origin, however, these grains can also be detrital with some help from grain-concentrating benthic agglutinated foraminifera<ref name=Schbr2009 /><ref name=Mllknea2007>.

</ref>, and sequence-stratigraphic packaging and parasequence stacking patterns<ref name=Lzr2007 /><ref name=Lzrea2015a /><ref name=Lzrea2015b /><ref>Schieber, J., and O. R. Lazar, 2004, Devonian black shales of the eastern U.S.: New insights into sedimentology and stratigraphy from the subsurface and outcrops in the Illinois and Appalachian basins: Indiana Geological Survey Open File Study 04-05, 90 p.</ref>. For example, Schieber<ref name=Schbr1996 /> was able to show that diagenetic infilling of algal cysts produced sand-size diagenetic quartz grains that are easily mistaken for detrital grains, which can lead to erroneous interpretations of mudstone-associated sandstone beds. This avenue of research was extended further when in distal mudstones, large proportions of silt-size (and presumably detrital) quartz grains were linked to early diagenetic processes as well<ref name=Schbrea2000 />. Chertlike grains may initially suggest a diagenetic origin, however, these grains can also be detrital with some help from grain-concentrating benthic agglutinated foraminifera<ref name=Schbr2009 /><ref name=Mllknea2007>.