https://ilstratwiki.web.illinois.edu/index.php?title=Historical:Trivoli_Sandstone_Member&feed=atom&action=historyHistorical:Trivoli Sandstone Member - Revision history2024-03-28T14:32:54ZRevision history for this page on the wikiMediaWiki 1.38.4https://ilstratwiki.web.illinois.edu/index.php?title=Historical:Trivoli_Sandstone_Member&diff=16104&oldid=prevJennifer.Obrad at 20:08, 24 January 20172017-01-24T20:08:19Z<p></p>
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{{Tree<br />
|tree1=McLeansboro Group <br />
|tree2=Modesto Formation <br />
|tree3=Trivoli Sandstone Member <br />
|tree21=Paleozoic Erathem <br />
|tree22=Pennsylvanian Subsystem <br />
|tree23=Desmoinesian Series <br />
|tree31=Absaroka Sequence <br />
|category1=Paleozoic Erathem<br />
|category2=Pennsylvanian Subsystem<br />
|category3=Absaroka Sequence<br />
|category4=McLeansboro Group<br />
|category5=Desmoinesian Series<br />
|category6=Modesto Formation<br />
|category7=Sandstone<br />
}}<br />
==Authors==<br />
M. E. Hopkins and J. A. Simon <br />
<br />
==Name Origin==<br />
The Trivoli Sandstone Member of the Modesto Formation (Wanless, 1931a, p. 182, 183, 190, 192), the top of which is the Desmoinesian-Missourian Series boundary, is named for Trivoli, Peoria County.<br />
==Type Section==<br />
The type section consists of exposures in a ravine northeast of Pea Ridge School, near Trivoli (SW 3, 9N-5E) (Wanless, 1956, p. 11; 1957, p. 121, 193).<br />
==Extent and Thickness==<br />
The Trivoli Sandstone is found both as a sheet facies generally less than 20 feet thick and as a channel facies that thickens to more than 80 feet, primarily at the expense of underlying strata (Andresen, 1961). The Trivoli is present throughout much of Illinois and marks one of the periods of major stream development during Pennsylvanian time in in Illinois.<br />
==References==<br />
ANDRESEN, M. J., 1961 , Geology and petrology of the Trivoli Sandstone in the Illinois Basin: Illinois State Geological Survey Circular 316, 31 p.<br><br />
WANLESS, H. R., 1931a, Pennsylvanian cycles in western Illinois: Illinois State Geological Survey Bulletin 60, p. <br><br />
WANLESS, H. R., 1956, Classification of the Pennsylvanian rocks of Illinois as of 1956: Illinois State Geological Survey Circular 217, 14 p.<br><br />
WANLESS, H. R., 1957, Geology and mineral resources of the Beardstown, Glasford, Havana, and Vermont Quadrangles: Illinois State Geological Survey Bulletin 82, 233 p.<br />
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