The town of Laurens is located in the northwest corner of Pocahontas County. The surface drift within the county is Wisconsin, while the underlying drifts are probably Kansan and Nebraskan

Cable, E. J.

English

University of Northern Iowa

Proceedings of the Iowa Academy of ScienceVolume 26 | Annual Issue Article 411919A Deep Well at Laurens, Pocahontas CountyE. J. CableIowa State Teachers CollegeCopyright © Copyright 1919 by the Iowa Academy of Science, Inc.Follow this and additional works at: https://scholarworks.uni.edu/piasThis Research is brought to you for free and open access by the Iowa Academy of Science at UNI ScholarWorks. It has been accepted for inclusion inProceedings of the Iowa Academy of Science by an authorized editor of UNI ScholarWorks. For more information, please contactscholarworks@uni.edu.Recommended CitationCable, E. J. (1919) "A Deep Well at Laurens, Pocahontas County," Proceedings of the Iowa Academy of Science, 26(1), 406-406.Available at: https://scholarworks.uni.edu/pias/vol26/iss1/41THE DEEP WELL AT LAURENS, POCAHONTAS COUNTYE. J. CABLEThe town of Laurens is located in the northwest corner of Poca-hontas county. The surface drift within the county is Wisconsin,while the underlying drifts are probably Kansan and Nebraskan.1. Black shale2. Yellow calcareous clay.3. Blue clay, calcareous . .4. Sand and gravel5. Blue clay, compact, calcareous.Feet310. 20610. 206. Sand 1507. Blue shale 508. Limestone 2859. Blue shale 1510. Limestone 26011. Blue shale 8012. Sandstone 35Inches681,125Horizons (1) to (3), inclusive, are Wisconsin drift. Horizon(4) is probably interglacial and equivalent in time to the Aftonianor Buchanan gravels. Horizon (5) is either Kansan or Nebraskandrift with a strong probability of being Kansan. Horizons (6) and(7) are undoubtedly Cretaceous, as Cretaceous deposits, consistingof sand and shales, are found immediately beneath the drift in thecounty. Horizon (8) may be Mississippian in age. Horizon (9)has not been found previously in the county at this depth. The assignment of horizon (9) to the upper Ordovician, Maquoketa shale,may be a possibility. If horizon (9) is Maquoketa shale, horizons(10) and (11) are possibly Galena to Platteville, inclusive.Horizon (12) is unquestionably Saint Peter sandstone, which isan aquifer for deep wells in this locality.The Saint Peter is encountered at Emmetsburg, Palo Alto county,at a depth of 864 feet, while at Laurens, it is reached at a depthof 1,100 feet. The Saint Peter sandstone descends 252 feet in 21%miles, or at the rate of 11.85 feet to the mile.DEPARTMENT OF GEOLOGY,THE STATE TEACHERS COLLEGE. 1Cable: A Deep Well at Laurens, Pocahontas CountyPublished by UNI ScholarWorks, 1919

A Deep Well at Laurens, Pocahontas County

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A Deep Well at Laurens, Pocahontas County

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