[2][1] This formation's members are, top to bottom, While the Elmont Limestone member is generally less than 3 feet thick (1 meter), it can be as thick as 15 feet (5 meters)[3] and as thin as 12 inches.

As thin as that, it is particularly resistant and forms multiple waterfalls within a few miles along Deep Creek in southern Riley County, including Pillsbury Crossing.

[6][7] At Pillsbury Crossing, the Elmont Limestone is seen with parallel joints (pictured); and where not thickly covered with algae, the surface shows curious parallelogram patterns.

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