Abstract:Uncertainty regarding the relations of cyclothems, as recognized in Illinois, and megacyclothems, that are typically developed in eastern Kansas, has obscured the correlation of Pennsylvanian strata e...Uncertainty regarding the relations of cyclothems, as recognized in Illinois, and megacyclothems, that are typically developed in eastern Kansas, has obscured the correlation of Pennsylvanian strata east and west of the Mississippi River and the interpretation of physical events that influenced sedimentation during the Pennyslvanian period. Lithologic analysis of the Kansas megacyclothem indicates that it is not equivalent to an Illinois cyclothem, as some have believed, but is composed of three or more incompletely developed simple cyclothems. A large sedimentary cycle recognized in Illinois, consisting of three or more different types of cyclothems, appears to be a differently developed, but otherwise comparable, megacyclothem. The suggestion is made that megacyclothems owe their existence to movements in the Ouachita geosyncline, which superimposed a large cycle on the small one responsible for the development of cyclothems. A still larger cycle, termed a hypercyclothem, is recognizable in eastern Kansas but is not explained.Read More
Publication Year: 2016
Publication Date: 2016-01-01
Language: en
Type: article
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