Difference between revisions of "Concretion"

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[[File:Rock.City.jpg|thumb|Rock City, near Minneapolis]]
 
[[File:Rock.City.jpg|thumb|Rock City, near Minneapolis]]
 
== Description ==
 
== Description ==
 
In geology, concretion is an anomalous mass of mineral matter found in [http://cameo.mfa.org/materials/fullrecord.asp?name=sandstone sandstone], [http://cameo.mfa.org/materials/fullrecord.asp?name=clay clay], or other [http://cameo.mfa.org/materials/fullrecord.asp?name=sedimentary sedimentary] rock. Concretions are form by the deposition of [http://cameo.mfa.org/materials/fullrecord.asp?name=silica silica], [http://cameo.mfa.org/materials/fullrecord.asp?name=calcite calcite], [http://cameo.mfa.org/materials/fullrecord.asp?name=gypsum gypsum], or other chemical compound. They are often found in concentric layers surrounding an original nucleus.
 
 
 
[[File:Sandstone_concretion.jpg|thumb|Sandstone concretion]]
 
[[File:Sandstone_concretion.jpg|thumb|Sandstone concretion]]
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In geology, concretion is an anomalous mass of mineral matter found in [[sandstone]], [[clay]], or other [[sedimentary]] rock. Concretions are form by the deposition of [[silica]], [[calcite]], [[gypsum]], or other chemical compound. They are often found in concentric layers surrounding an original nucleus.
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[[File:Concretions_ICOMOS.jpg|thumb|Concretions<br>Credit: J. Delgado Rodrigues]]
 
== Synonyms and Related Terms ==
 
== Synonyms and Related Terms ==
  
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== Additional Images ==
 
== Additional Images ==
 
 
<gallery>
 
<gallery>
 
File:Devils.Bake.Oven_Dakota.sandstone.jpg|'Devil's Bake Oven' at Mushroom Rock State Park
 
File:Devils.Bake.Oven_Dakota.sandstone.jpg|'Devil's Bake Oven' at Mushroom Rock State Park
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File:Dakota.sandstone_concretion.jpg|Dakota Sandstone concretion
 
File:Dakota.sandstone_concretion.jpg|Dakota Sandstone concretion
 
File:Dakota.formation.sandstone_concretion.jpg|Dakota Formation sandstone concretions
 
File:Dakota.formation.sandstone_concretion.jpg|Dakota Formation sandstone concretions
File:Concretions_ICOMOS.jpg|Concretions
 
 
</gallery>
 
</gallery>
  
 
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==Resources and Citations==
== Authority ==
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* ICOMOS-ISCS: [http://www.international.icomos.org/publications/monuments_and_sites/15/pdf/Monuments_and_Sites_15_ISCS_Glossary_Stone.pdf Illustrated glossary on stone deterioration patterns]
  
 
* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971
 
* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971

Latest revision as of 12:06, 4 July 2022

Rock City, near Minneapolis

Description

Sandstone concretion

In geology, concretion is an anomalous mass of mineral matter found in Sandstone, Clay, or other Sedimentary rock. Concretions are form by the deposition of Silica, Calcite, Gypsum, or other chemical compound. They are often found in concentric layers surrounding an original nucleus.

Concretions
Credit: J. Delgado Rodrigues

Synonyms and Related Terms

agglomerate; concrétion (Fr.);concrecion (Esp.); concreção (Port.); Konkretion (Deut.); concretie (Ned.)

Additional Images

Resources and Citations

  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971
  • Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
  • Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
  • The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998