Morse, 2001										Data Set 48
Reference:  Morse, D.G., 2001, Sedimentology, diagenesis and trapping style, Mississippian Tar Springs Sandstone, Inman East Consolidated Field, Gallatin County, Illinois: Illinois State Geological Survey, Illinois Petroleum 157, 67 p.
Authors' affiliation:  Illinois State Geological Survey
Age:  Mississippian
Formation:  Tar Springs Sandstone
Location:  Inman East Consolidated Field, Illinois Basin, Gallatin County, Illinois
Well:  Carter Oil No. 3 Williams
Depth range:  2115-2133 feet
Depositional setting:  “The Tar Springs Sandstone is 40 to 150 feet thick and consists of well-sorted sandstone bodies formed in delta distributary channels that were part of a basin-wide, generally north to southward prograding delta complex.”
Lithology:  “The sandstones are composed primarily of fine to very fine-grained, well-sorted quartzose sand originally with 2% to 5% feldspar grains.”
Alteration:  “Feldspar grains appear clouded in thin section and typically are partially altered to clay minerals.  The primary cement is quartz, appearing as overgrowhs on the quartz grains.  Later cements include ankerite (an iron-rich dolomite) and a variety of clay minerals consisting mostly of kaolinite and lesser amounts of chlorite, mixed layered illite/smectite and illite.”  
Production:  oil
Core measurement conditions:  not stated.
Data entry:  manual entry from tables on pages 52 and 57 of the referenced paper.