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Primary source[edit | edit source]

Willman, H. B., and John C. Frye, 1970, Pleistocene Stratigraphy of Illinois: Illinois State Geological Survey Bulletin 94, 204 p.

Contributing author(s)[edit | edit source]

H. B. Willman and John C. Frye

Name[edit | edit source]

Original description[edit | edit source]

Toulon Member, Glasford Formation (Willman and Frye 1970).

Derivation[edit | edit source]

The Toulon Member of the Glasford Formation is named for Toulon, Stark County.

Other names[edit | edit source]

History/background[edit | edit source]

Type section[edit | edit source]

Type location[edit | edit source]

The type section is from exposures in a borrow pit three quarters of a mile west of Toulon, NW NW SW Sec. 24, T. 13 N., R. 5 E., described in the Toulon Section (table 6). <center> {| class="wikitable" style="text-align: center;" |- |'''Table 6 -- Stratigraphic Sections (partial)'''<br>The following 21 stratigraphic sections describe exposures in Illinois and illustrate many of the aspects of Pleistocene stratigraphy. These sections contain the type localities for 21 rock-stratigraphic units, 4 soil-stratigraphic units, and 3 time-stratigraphic units and include paratypes for several other units. The sample numbers preceded by "P" are the numbers used in the Illinois State Geological Survey collections. Analytical data on many of these samples are on file at the Survey. The sections are arrange alphabetically by name. |- |<gallery caption="" widths=250px heights=250px perrow=4> 94-tb_6-j.jpg|{{file:94-tb_6-j.jpg}} 94-tb_6-k.jpg|{{file:94-tb_6-k.jpg}} </gallery> |} </center>

Type author(s)[edit | edit source]

Type status[edit | edit source]

Reference section[edit | edit source]

Reference location[edit | edit source]

Reference author(s)[edit | edit source]

Reference status[edit | edit source]

Stratigraphic relationships[edit | edit source]

It is bounded above by the base of the Radnor Till Member and below by the top of the underlying Hulick Till Member; it can be identified as a member only when it occurs between these two till members. The uppermost silt may be a stratigraphic equivalent of the Roby Silt of east-central Illinois, but this has not as yet been confirmed.

Extent and thickness[edit | edit source]

It is 5 to 10 feet thick, but, as it has not been widely recognized, it probably is much thicker in some areas.

Lithology[edit | edit source]

It consists of glacially derived sand, gravel, and silt. In the Jubilee College Section (table 6) the member consists of calcareous, gray silt and fine sand at the top, overlying a weakly developed unnamed soil in the top of sand and gravel outwash, which in turn unconformably overlies the Hulick Till. Compositional data for the Toulon Member are given in table 5. <center> {| class="wikitable" style="text-align: center;" |- |<gallery caption="Table 5 -- Selected Analyses from Stratigraphic Sections Described in Table 6 (X-ray analyses by H. D. Glass, Illinois State Geological Survey)." widths=250px heights=250px perrow=4> 94-tb_5-e.jpg|{{file:94-tb_5-e.jpg}} </gallery> |} </center> <center> {| class="wikitable" style="text-align: center;" |- |'''Table 6 -- Stratigraphic Sections (partial)'''<br>The following 21 stratigraphic sections describe exposures in Illinois and illustrate many of the aspects of Pleistocene stratigraphy. These sections contain the type localities for 21 rock-stratigraphic units, 4 soil-stratigraphic units, and 3 time-stratigraphic units and include paratypes for several other units. The sample numbers preceded by "P" are the numbers used in the Illinois State Geological Survey collections. Analytical data on many of these samples are on file at the Survey. The sections are arrange alphabetically by name. |- |<gallery caption="" widths=250px heights=250px perrow=4> 94-tb_6-e.jpg|{{file:94-tb_6-e.jpg}} 94-tb_6-f.jpg|{{file:94-tb_6-f.jpg}} </gallery> |} </center>

Core(s)[edit | edit source]

Photograph(s)[edit | edit source]

Contacts[edit | edit source]

Well log characteristics[edit | edit source]

Fossils[edit | edit source]

Age and correlation[edit | edit source]

As the minor soil in the upper part of the member is the boundary of two substages, the bulk of the lower part of the member is in the Monican Substage, but the upper silts are in the Jubileean Substage of the Illinoian Stage. The lower, outwash part of the member is judged to be retreatal outwash, whereas the local silts at the top are pro-glacial deposits in front of the advancing glacier that deposited the overlying Radnor Till Member.

Environments of deposition[edit | edit source]

Economic importance[edit | edit source]

Remarks[edit | edit source]

Reference(s)[edit | edit source]

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