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The Jordan Formation (also classified as the Jordan Sandstone or the Jordan Member of the Trempealeau Formation) is a siliciclastic sedimentary rock unit identified in Illinois, Michigan, Wisconsin, Minnesota, and Iowa. Named for distinctive outcrops in the Minnesota River Valley near the town of Jordan, it extends throughout the Iowa Shelf and eastward over the Wisconsin Arch and Lincoln anticline into the Michigan Basin.

AttributesValues
rdf:type
rdfs:label
  • Jordan Formation (en)
rdfs:comment
  • The Jordan Formation (also classified as the Jordan Sandstone or the Jordan Member of the Trempealeau Formation) is a siliciclastic sedimentary rock unit identified in Illinois, Michigan, Wisconsin, Minnesota, and Iowa. Named for distinctive outcrops in the Minnesota River Valley near the town of Jordan, it extends throughout the Iowa Shelf and eastward over the Wisconsin Arch and Lincoln anticline into the Michigan Basin. (en)
name
  • Jordan Formation (en)
foaf:depiction
  • http://commons.wikimedia.org/wiki/Special:FilePath/JordanOneota_MillersCurve.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/JordanSSHoytPark.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/MendotaStation_SWOutcrop2Reduced.jpg
dcterms:subject
Wikipage page ID
Wikipage revision ID
Link from a Wikipage to another Wikipage
Link from a Wikipage to an external page
sameAs
subunits
  • Norwalk Member, Van Oser Member, Waukon Member, Sunset Point Member (en)
underlies
  • Oneota Formation of the Prairie du Chien Group (en)
unitof
dbp:wikiPageUsesTemplate
thumbnail
age
  • Late Cambrian (en)
caption
  • Outcrop of the Jordan Sandstone at Hoyt Park, Madison, WI. The rock-hammer rests near the contact of the Van Oser Member and overlying Sunset Point Member. (en)
country
  • United States (en)
period
  • Cambrian (en)
region
  • Iowa Shelf, Wisconsin Arch, Lincoln Anticline, Michigan Basin (en)
type
has abstract
  • The Jordan Formation (also classified as the Jordan Sandstone or the Jordan Member of the Trempealeau Formation) is a siliciclastic sedimentary rock unit identified in Illinois, Michigan, Wisconsin, Minnesota, and Iowa. Named for distinctive outcrops in the Minnesota River Valley near the town of Jordan, it extends throughout the Iowa Shelf and eastward over the Wisconsin Arch and Lincoln anticline into the Michigan Basin. Stratigraphically, the Jordan Formation is the uppermost unit of the type St. Croixan Series (historically, the uppermost subdivision of the Cambrian in North America). It is predominantly composed of mature, poorly cemented quartz sandstone, though several distinct facies have been identified on the basis of grain size, feldspathic content, and sedimentary structures. The Jordan is an important source of silica. Historically, the unit has been mined extensively for glass manufacturing, though recently it has been utilized as a source of frac sand. This porous, poorly cemented stratum is also an important aquifer and a major source of drinking water for people throughout the upper Midwest. (en)
extent
  • Minnesota, Wisconsin, Illinois, Michigan, Iowa, Missouri (en)
namedby
  • N. H. Winchell (en)
namedfor
overlies
  • St. Lawrence Formation of the Trempeleau Group (en)
prilithology
gold:hypernym
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