Dennis Formation

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Dennis Formation
Stratigraphic range: Carboniferous
Type Formation
Location
Region Missouri
Country United States

The Dennis Formation is a geologic formation in Missouri. It preserves fossils dating back to the late Carboniferous period. The formation is part of the Kansas City Group, Missourian Stage, Pennsylvanian subperiod of the Carboniferous period.

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The formation members, from bottom to top, are Canville Limestone, Stark Shale, and Winterset Limestone.

The three members form the major part of a cyclothem, created as sea water rise quickly and then gradually fall again over millions of years.

Simplified outline of a basic cyclothem as found in the geology of eastern Kansas, northwest Missouri, and southwest Iowa. After "Field Guide to Upper Pennsylvanian Cyclothemic Limestone Facies in Eastern Kansas", figure 4. Click to view at full size. Kansas-Missouri-Iowa-Outcrop-Belt-Cyclothem-Outline.png
Simplified outline of a basic cyclothem as found in the geology of eastern Kansas, northwest Missouri, and southwest Iowa. After "Field Guide to Upper Pennsylvanian Cyclothemic Limestone Facies in Eastern Kansas", figure 4. Click to view at full size.

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