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 == | ||
| − | + | [[File:Sandstone_concretion.jpg|thumb|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. | 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]] | [[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 == | ||
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<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 | ||
Revision as of 11:06, 4 July 2022
Description
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.
Synonyms and Related Terms
agglomerate; concrétion (Fr.);concrecion (Esp.); concreção (Port.); Konkretion (Deut.); concretie (Ned.)
Additional Images
'Devil's Bake Oven' at Mushroom Rock State Park
'Pulpit Rock' at Mushroom Rock State Park
Dakota Sandstone concretion
Dakota Formation sandstone concretions
Resources and Citations
- ICOMOS-ISCS: Illustrated glossary on stone deterioration patterns
- 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