Mendota Anticline (Discarded)
Location
Northwestern La Salle and southeastern De Kalb Counties
References
Willman and Payne 1942
Description
Using widely scattered borehole data, Willman and Payne (1942) mapped the Mendota Anticline trending east-northeast. They interpreted it as a pre-Middle Ordovician structure because Cambrian strata were folded but the St. Peter Sandstone was not. A structure map of the Franconia Formation (Cambrian) by Kolata et al. (1983; fig. 17) shows only a subtle east-trending anticlinal nose in northern La Salle County. Kolata et al. (1983) had considerably better data than Willman and Payne. Hence, the Mendota Anticline is, at best, a minor inflection of contour lines and use of the name should be discontinued.
Figure(s)
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