Abbott Formation (ILPAa;0)

State	Illinois
Name	Abbott Formation
Geologic age	Pennsylvanian
Original map label	3540
Comments	from the map legend it appears that the unit consists of about 75% sandstone (including the Murray Bluff, Grndstaff, Bernadotte, and Babylon sandstone members), 15% shale, 5% underclay and 5% coal.
Primary rock type	sandstone
Secondary rock type	shale
Other rock types	clay or mud; coal
Lithologic constituents	Major Sedimentary > Clastic > SandstoneAbbott Formation - from the map legend it appears that the unit consists of about 75% sandstone (including the Murray Bluff, Grndstaff, Bernadotte, and Babylon sandstone members), 15% shale, 5% underclay and 5% coal. Minor Sedimentary > Clastic > Mudstone > ShaleAbbott Formation - from the map legend it appears that the unit consists of about 75% sandstone (including the Murray Bluff, Grndstaff, Bernadotte, and Babylon sandstone members), 15% shale, 5% underclay and 5% coal. Incidental Sedimentary > CoalAbbott Formation - from the map legend it appears that the unit consists of about 75% sandstone (including the Murray Bluff, Grndstaff, Bernadotte, and Babylon sandstone members), 15% shale, 5% underclay and 5% coal. Sedimentary > Clastic > Mudstone > ClaystoneAbbott Formation - from the map legend it appears that the unit consists of about 75% sandstone (including the Murray Bluff, Grndstaff, Bernadotte, and Babylon sandstone members), 15% shale, 5% underclay and 5% coal.
Map references	Willman, H.B., and others, (compilers), 1967, Geologic Map of Illinois: Illinois State Geological Survey, scale= 1:500,000, paper.
Unit references	Willman, H.B., and others, (compilers), 1967, Geologic Map of Illinois: Illinois State Geological Survey, scale= 1:500,000, paper.
Geographic coverage	Adams - Bureau - Fulton - Gallatin - Hancock - Hardin - Henderson - Henry - Jackson - Johnson - Knox - Lee - McDonough - Mercer - Monroe - Perry - Pope - Randolph - Rock Island - Saint Clair - Saline - Schuyler - Union - Warren - Whiteside - Williamson