Fissility (geology): Difference between revisions
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[[File:Ardoise à fromage.jpg|thumb|Slate displaying fissility]] |
[[File:Ardoise à fromage.jpg|thumb|Slate displaying fissility]] |
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'''Fissility''' or '''fissibility''' refers to the property of [[Rock (geology)|rock]]s to split along planes of weakness into thin sheets.<ref>[https://books.google.com/books?id=voakD8HV9DgC&pg=PA92&lpg=PA92&dq=fissility&source=bl&ots=b818afMe2r&sig=yFStYNTyUSEUSsfdqLBKwiEZNoE&hl=en&ei=bDm3Su-cH9eN4gaGirV8&sa=X&oi=book_result&ct=result&resnum=10#v=onepage&q=fissility&f=false Tucker , M.E. 2001. Sedimentary petrology: an introduction to the origin of sedimentary rocks, WileyBlackwell, 3rd Edition, 272pp.]</ref> This is commonly observed in [[shale]]s, which are [[sedimentary rock]]s, and in [[slate]]s and [[phyllite]]s, which are [[foliation (geology)|foliated]] [[metamorphic rock]]s. The fissility in these rocks is caused by the preferred alignment of platy [[phyllosilicate]] grains due to [[Compaction (geology)|compaction]], deformation or new mineral growth.<ref>[http://bulletin.geoscienceworld.org/cgi/content/abstract/64/8/869 Ingram, R.L. 1953. Fissility of mudrocks, GSA Bulletin, 64, 869-878.]</ref> A highly fissile rock splits easily along the [[Cleavage (geology)|cleavage]].<ref>''"Chattanooga Shale: The shale is highly fissile (easily cleaved) most often black but may be brown where weathered."'' Anderson, Carl (1976) [http://www.caves.org/survey/gss/GSSWebsite/Report_Caves_files/gssrck.pdf "Index and Short Description to the Geologic terms used by the GSS"] ''Georgia State Base Geologic Map'' page 5; archived {{webarchive |url=https://web.archive.org/web/20110703215343/http://www.caves.org/survey/gss/GSSWebsite/Report_Caves_files/gssrck.pdf |date=July 3, 2011 }} by [[Internet Archive]] on 3 July 2011</ref> |
'''Fissility''' or '''fissibility''' refers to the property of [[Rock (geology)|rock]]s to split along planes of weakness into thin sheets.<ref>[https://books.google.com/books?id=voakD8HV9DgC&pg=PA92&lpg=PA92&dq=fissility&source=bl&ots=b818afMe2r&sig=yFStYNTyUSEUSsfdqLBKwiEZNoE&hl=en&ei=bDm3Su-cH9eN4gaGirV8&sa=X&oi=book_result&ct=result&resnum=10#v=onepage&q=fissility&f=false Tucker , M.E. 2001. Sedimentary petrology: an introduction to the origin of sedimentary rocks, WileyBlackwell, 3rd Edition, 272pp.]</ref> This is commonly observed in [[shale]]s, which are [[sedimentary rock]]s, and in [[slate]]s and [[phyllite]]s, which are [[foliation (geology)|foliated]] [[metamorphic rock]]s. The fissility in these rocks is caused by the preferred alignment of platy [[phyllosilicate]] grains due to [[Compaction (geology)|compaction]], deformation or new mineral growth.<ref>[http://bulletin.geoscienceworld.org/cgi/content/abstract/64/8/869 Ingram, R.L. 1953. Fissility of mudrocks, GSA Bulletin, 64, 869-878.]</ref> A highly fissile rock splits easily along the [[Cleavage (geology)|cleavage]].<ref>''"Chattanooga Shale: The shale is highly fissile (easily cleaved) most often black but may be brown where weathered."'' Anderson, Carl (1976) [http://www.caves.org/survey/gss/GSSWebsite/Report_Caves_files/gssrck.pdf "Index and Short Description to the Geologic terms used by the GSS"] {{wayback|url=http://www.caves.org/survey/gss/GSSWebsite/Report_Caves_files/gssrck.pdf |date=20110703215343 }} ''Georgia State Base Geologic Map'' page 5; archived {{webarchive |url=https://web.archive.org/web/20110703215343/http://www.caves.org/survey/gss/GSSWebsite/Report_Caves_files/gssrck.pdf |date=July 3, 2011 }} by [[Internet Archive]] on 3 July 2011</ref> |
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==See also== |
==See also== |
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Revision as of 08:14, 1 January 2017
Fissility or fissibility refers to the property of rocks to split along planes of weakness into thin sheets.[1] This is commonly observed in shales, which are sedimentary rocks, and in slates and phyllites, which are foliated metamorphic rocks. The fissility in these rocks is caused by the preferred alignment of platy phyllosilicate grains due to compaction, deformation or new mineral growth.[2] A highly fissile rock splits easily along the cleavage.[3]
See also
References
- ^ Tucker , M.E. 2001. Sedimentary petrology: an introduction to the origin of sedimentary rocks, WileyBlackwell, 3rd Edition, 272pp.
- ^ Ingram, R.L. 1953. Fissility of mudrocks, GSA Bulletin, 64, 869-878.
- ^ "Chattanooga Shale: The shale is highly fissile (easily cleaved) most often black but may be brown where weathered." Anderson, Carl (1976) "Index and Short Description to the Geologic terms used by the GSS" Archived 2011-07-03 at the Wayback Machine Georgia State Base Geologic Map page 5; archived Archived July 3, 2011, at the Wayback Machine by Internet Archive on 3 July 2011
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