Uptons Cave Syncline

Part of the Plum River Fault Zone

Location

Northern Carroll and Ogle Counties (A-3, 4, 5)

References

Cady 1920, Kolata and Buschbach 1976

Description

Cady (1920) first recognized the presence of this structure, which he called the Stephenson-Ogle County Line Syncline. As mapped by Kolata and Buschbach (1976), the Uptons Cave Syncline lies immediately north of and trends parallel with the Plum River Fault Zone (fig. 37). It is indicated by outcrops and scanty well data.

Figure(s)

Figure 37   The Plum River Fault Zone and related structures, northwestern Illinois. Structure contours on top of the Glenwood Formation (Middle Ordovician). After Kolata and Buschbach 1976. Contour interval is 50 feet.