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- |tree1=Petersburg Silt The Petersburg Silt was named in 1963 (Willman, Glass, and Frye) for Petersburg, Menard County.4 KB (520 words) - 22:41, 3 January 2017
- |tree1=Petersburg Silt ...tocene Stratigraphy of Illinois: Illinois State Geological Survey Bulletin 94, 204 p.4 KB (582 words) - 22:31, 12 January 2017
- 94-tb_6-b.jpg|{{file:94-tb_6-b.jpg}} 94-tb_6-c.jpg|{{file:94-tb_6-c.jpg}}5 KB (773 words) - 22:14, 3 January 2017
- |tree2=Loveland Silt The Loveland Silt was named the Loveland joint clay by Shimek in 1909 for Loveland, Iowa, fro6 KB (856 words) - 22:23, 3 January 2017
- ...ncated prior to the deposition of the overlying Glasford Formation. At the Petersburg Dam and Zion Church Sections it is an accretion-gley assigned to the Lierle 94-tb_6-a.jpg|{{file:94-tb_6-a.jpg}}7 KB (1,133 words) - 22:43, 3 January 2017
- ...tocene Stratigraphy of Illinois: Illinois State Geological Survey Bulletin 94, 204 p. 94-tb_6-b.jpg|{{file:94-tb_6-b.jpg}}6 KB (833 words) - 22:28, 12 January 2017
- |tree2=Loveland Silt ...tocene Stratigraphy of Illinois: Illinois State Geological Survey Bulletin 94, 204 p.6 KB (911 words) - 21:17, 12 January 2017
- 94-tb_6-i.jpg|{{file:94-tb_6-i.jpg}} 94-tb_6-j.jpg|{{file:94-tb_6-j.jpg}}11 KB (1,564 words) - 22:23, 3 January 2017
- ...tocene Stratigraphy of Illinois: Illinois State Geological Survey Bulletin 94, 204 p. ...ncated prior to the deposition of the overlying Glasford Formation. At the Petersburg Dam and Zion Church Sections it is an accretion-gley assigned to the Lierle8 KB (1,197 words) - 22:33, 12 January 2017
- ...tocene Stratigraphy of Illinois: Illinois State Geological Survey Bulletin 94, 204 p. 94-tb_6-i.jpg|{{file:94-tb_6-i.jpg}}11 KB (1,623 words) - 21:14, 12 January 2017
- 94-tb_6-i.jpg|{{file:94-tb_6-i.jpg}} 94-tb_6-j.jpg|{{file:94-tb_6-j.jpg}}10 KB (1,522 words) - 22:46, 3 January 2017
- ...tocene Stratigraphy of Illinois: Illinois State Geological Survey Bulletin 94, 204 p. 94-pl_2.jpg|{{file:94-pl_2.jpg}}4 KB (637 words) - 22:35, 12 January 2017
- ...tocene Stratigraphy of Illinois: Illinois State Geological Survey Bulletin 94, 204 p. 94-tb_6-i.jpg|{{file:94-tb_6-i.jpg}}11 KB (1,578 words) - 22:33, 12 January 2017