Nonesuch Shale
The Nonesuch Shale is a Proterozoic geologic formation that outcrops in Michigan and Wisconsin , United States , but has been found by drill holes to extend in the subsurface as far southwest as Iowa . 
<triplet> Michigan <subj> United States <obj> country <triplet> Wisconsin <subj> United States <obj> country <triplet> United States <subj> Michigan <obj> contains administrative territorial entity <subj> Wisconsin <obj> contains administrative territorial entity <subj> Iowa <obj> contains administrative territorial entity <triplet> Iowa <subj> United States <obj> country