Figure 7. Completed 3-D geologic model. Red = basal drift aquifer; gray = Glasford Formation; Yellow = Pearl-Ashmore aquifer, Light green = Tiskilwa Formation, Orange = Henry Formation, Blue = Yorkville Member of the Lemont Formation; Dark green = Haeger Member of the Lemont Formation; Purple = Equality Formation

From

Stratigraphy and Extent of the Pearl-Ashmore Aquifer, Mchenry County, IL, USA

Carlock Drew C., Thomason Jason F., Malone David H., Peterson Eric W.

World Journal of Environmental Engineering. 2016, 4(1), 6-18 doi:10.12691/wjee-4-1-2