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- Omarolluk abstract "Omarolluks, sometimes shortened to "omars," are a distinctive type of glacial erratic that consists of dark siliceous greywacke and exhibits prominent rounded, often deep, hemispherical voids and pits. The hemispherical voids and pits result from the selective dissolution of carbonate concretions within the greywacke. The greywacke, of which Omars consist, is identifiable by its low metamorphic grade and the 10%–40% rock fragments, distinctive volcanic clasts, and spherical carbonate concretions that it contains. Omars are typically rounded and range in size from pebbles to boulders. Their rounded shape, whether found in glacial tills or glacial-fluvial (outwash) gravels, indicate that they were eroded from pre-existing littoral or fluvial deposits. Omars are typically found associated with granules and pebbles of oolitic jasper that were transported from the Belcher Islands in Hudson Bay, Canada.The name given these glacial erratics refer to their source, which is the Proterozoic Omarolluk Formation in the Belcher Islands in southeast Hudson Bay. The Laurentide Ice Sheet eroded omars from the Belcher Islands, an archipelago limited to only about a quarter of 1% of Hudson Bay. Glaciers moved omars from the southeastern part of Hudson Bay to central Canada and into the U.S. where they were deposited on moraines. Because scientists know precisely where they came from they are very valuable in documenting the movement of glaciers.".
- Omarolluk thumbnail OmarPen.png?width=300.
- Omarolluk wikiPageID "24941985".
- Omarolluk wikiPageLength "3128".
- Omarolluk wikiPageOutDegree "21".
- Omarolluk wikiPageRevisionID "599085319".
- Omarolluk wikiPageWikiLink Archipelago.
- Omarolluk wikiPageWikiLink Belcher_Islands.
- Omarolluk wikiPageWikiLink Canada.
- Omarolluk wikiPageWikiLink Category:Sedimentology.
- Omarolluk wikiPageWikiLink Concretion.
- Omarolluk wikiPageWikiLink Cupstone.
- Omarolluk wikiPageWikiLink File:NutterPen759.pdf.
- Omarolluk wikiPageWikiLink Fluvial.
- Omarolluk wikiPageWikiLink Glacial_erratic.
- Omarolluk wikiPageWikiLink Glacier.
- Omarolluk wikiPageWikiLink Glaciers.
- Omarolluk wikiPageWikiLink Granule_(geology).
- Omarolluk wikiPageWikiLink Greywacke.
- Omarolluk wikiPageWikiLink Hudson_Bay.
- Omarolluk wikiPageWikiLink Jasper.
- Omarolluk wikiPageWikiLink Lithic_technology.
- Omarolluk wikiPageWikiLink Littoral_zone.
- Omarolluk wikiPageWikiLink Moraine.
- Omarolluk wikiPageWikiLink Moraines.
- Omarolluk wikiPageWikiLink Oolite.
- Omarolluk wikiPageWikiLink Pebble.
- Omarolluk wikiPageWikiLink Proterozoic.
- Omarolluk wikiPageWikiLink Till.
- Omarolluk wikiPageWikiLinkText "Omarolluk".
- Omarolluk wikiPageWikiLinkText "omarolluk".
- Omarolluk alt "An Omar with a hemispherical void. Note coin for scale.".
- Omarolluk boxbgcolor "604800.0".
- Omarolluk caption "An Omar with a hemispherical void in its side.".
- Omarolluk category "Native Minerals".
- Omarolluk hasPhotoCollection Omarolluk.
- Omarolluk name "Omar".
- Omarolluk wikiPageUsesTemplate Template:Infobox_mineral.
- Omarolluk wikiPageUsesTemplate Template:Prehistoric_technology.
- Omarolluk subject Category:Sedimentology.
- Omarolluk hypernym Type.
- Omarolluk type ChemicalSubstance.
- Omarolluk type Mineral.
- Omarolluk type Subfield.
- Omarolluk type ChemicalObject.
- Omarolluk type Thing.
- Omarolluk type Q7946.
- Omarolluk comment "Omarolluks, sometimes shortened to "omars," are a distinctive type of glacial erratic that consists of dark siliceous greywacke and exhibits prominent rounded, often deep, hemispherical voids and pits. The hemispherical voids and pits result from the selective dissolution of carbonate concretions within the greywacke.".
- Omarolluk label "Omarolluk".
- Omarolluk sameAs m.09gmh6k.
- Omarolluk sameAs Q7089890.
- Omarolluk sameAs Q7089890.
- Omarolluk wasDerivedFrom Omarolluk?oldid=599085319.
- Omarolluk depiction OmarPen.png.
- Omarolluk isPrimaryTopicOf Omarolluk.
- Omarolluk name "Omar".