Marywood Member
Lithostratigraphy: Knox Dolomite Megagroup >>Ironton Sandstone >>Marywood Member
Chronostratigraphy: Paleozoic Erathem >>Cambrian System >>Croixan Series >>Franconian Stage
Allostratigraphy: Sauk Sequence
Primary source
Willman, H. B., Elwood Atherton, T. C. Buschbach, Charles Collinson, John C. Frye, M. E. Hopkins, Jerry A. Lineback, and Jack A. Simon, 1975, Handbook of Illinois Stratigraphy: Illinois State Geological Survey Bulletin 95, 261 p.
Contributing author(s)
T. C. Buschbach
Name
Original description
The Marywood Member of the Ironton Sandstone (Buschbach, 1964, p. 37).
Derivation
Named for Marywood, Kane County.
Other names
History/background
Type section
Type location
The type section of the Marywood Member is located 4 miles north of Marywood, Kane County, at a depth of 1120-1168 feet in the same well as the Buelter type section.
Type author(s)
Type status
Reference section
Reference location
Reference author(s)
Reference status
Stratigraphic relationships
The Marywood Member overlies the Fox Valley Member of the Ironton Sandstone.
Extent and thickness
The Marywood Member appears to be as widespread as the other members, but in some areas it is not readily separated from the units above and below. It is 10-50 feet thick.
Lithology
The Marywood Member consists of sandstone that is finer grained and less dolomitic than the units above and below.
Core(s)
Photograph(s)
Contacts
Well log characteristics
Fossils
Age and correlation
Environments of deposition
Economic importance
Remarks
References
BUSCHBACH, T. C., 1964, Cambrian and Ordovician strata of northeastern Illinois: Illinois State Geological Survey Report of Investigations 218, 90 p.
ISGS Codes
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