10,323
edits
Changes
Jump to navigation
Jump to search
Line 1:
Line 1: − + − Pages 21-33+ − https://doi.org/10.1306/137122973860+ − Chapter 2: Mudstone Nomenclature+ − + − + + + + + + + + + Line 32:
Line 40: − +
→Texture (Grain Size)
Memoir 126: Sequence Stratigraphy: Applications to Fine-Grained Rocks, 2022
{{publication
| image = M126-Cover.jpeg
| width = 120px
| series = Memoir
O. R. Lazar, K. M. Bohacs, J. Schieber, J. H. S. Macquaker, T. M. Demko
| title = Sequence Stratigraphy: Applications to Fine-Grained Rocks
| chapter = Mudstone Nomenclature
| frompg = 21
| topg = 33
| author = O. R. Lazar, K. M. Bohacs, J. Schieber, J. H. S. Macquaker, T. M. Demko
| link = https://archives.datapages.com/data/specpubs/memoir126/data/21_aapg-sp2160021.htm
| pdf =
| store =
| isbn =
}}
This article introduces the key aspects of [[mudstone]] and the naming scheme we recommend and use when characterizing mudstone in outcrops, cores, and thin sections. This naming scheme is based on three key rock attributes: texture, bedding, and composition. This scheme has been designed to enable textural (grain size), bedding, compositional, and grain origin attributes to be captured and compared consistently for the entire spectrum of fine-grained sedimentary rocks and across a range of scales—from hand specimen to scanning electron microscopy image.
This article introduces the key aspects of [[mudstone]] and the naming scheme we recommend and use when characterizing mudstone in outcrops, cores, and thin sections. This naming scheme is based on three key rock attributes: texture, bedding, and composition. This scheme has been designed to enable textural (grain size), bedding, compositional, and grain origin attributes to be captured and compared consistently for the entire spectrum of fine-grained sedimentary rocks and across a range of scales—from hand specimen to scanning electron microscopy image.
===Texture (Grain Size)===
===Texture (Grain Size)===
Textural analysis (grain size, shape, orientation of individual grains, and overall sorting) provides insights into (1) sediment provenance, (2) proximity to sediment supply points, (3) water column energy level, and (4) rock properties such as porosity and permeability. Grain size is a commonly used attribute in descriptions and classifications of fine-grained sedimentary rocks<ref name=Pcrd1971 /><ref name=Stw1981 /><ref name=Ingrm1953 /><ref name=Shprd /><ref name=Trtlt /><ref name=Flk1965 /><ref name=Flk1968 />><ref name=Pttijn /><ref name=Bltt1980 /><ref name=Lndgard><ref name=Pttr1980 /><ref name=Pttr2005 /><ref name=Sprs /><ref name=Flmng /><ref name=McQkrAdms2003 /><ref name=Lzrea2010 /><ref name=Lzrea2015a /><ref name=Lzrea2015b /><ref>Trefethen, J. M., 1950, Classification of sediments: American Journal of Science, v. 248, p. 55–62.</ref>. Grains can be simple or composite (e.g., floccules, pellets, or intraclasts).
Textural analysis (grain size, shape, orientation of individual grains, and overall sorting) provides insights into (1) sediment provenance, (2) proximity to sediment supply points, (3) water column energy level, and (4) rock properties such as porosity and permeability. Grain size is a commonly used attribute in descriptions and classifications of fine-grained sedimentary rocks<ref name=Pcrd1971 /><ref name=Stw1981 /><ref name=Ingrm1953 /><ref name=Shprd /><ref name=Trtlt /><ref name=Flk1965 /><ref name=Flk1968 /><ref name=Pttijn /><ref name=Bltt1980 /><ref name=Lndgard /><ref name=Pttr1980 /><ref name=Pttr2005 /><ref name=Sprs /><ref name=Flmng /><ref name=McQkrAdms2003 /><ref name=Lzrea2010 /><ref name=Lzrea2015a /><ref name=Lzrea2015b /><ref>Trefethen, J. M., 1950, Classification of sediments: American Journal of Science, v. 248, p. 55–62.</ref>. Grains can be simple or composite (e.g., floccules, pellets, or intraclasts).
===Grain-Size Ranges===
===Grain-Size Ranges===