Map

Identification Information:
Citation:
Citation Information:
Publication Date: 20210825
Title: Map
Description:
Abstract: Please see the individual layers below to access the detailed metadata.In order to support science-based water resource management, a systematic effort was undertaken to characterize the nature and function of the hydrogeology in Jo Daviess County, Illinois. Jo Daviess County is a karst area. Karst is a geologically and hydrologically integrated or interconnected and self-organizing network of landforms and subsurface large-scale, secondary porosity created by a combination of fractured carbonate bedrock, the movement of water into and through the rock body as part of the hydrologic cycle, and physical and chemical weathering (Panno, S.V. et al, 2017). Springs, cover-collapse sinkholes, crevices, and caves are among the defining features of a karst terrain; each of these features is found in Jo Daviess County. Examples of these features have been located in the field and characterized by scientists from the Illinois State Geological and Water Surveys (Prairie Research Institute, University of Illinois at Urbana-Champaign).An unforeseen outcome of the 2012 summer drought that impacted the U.S. Midwest and adversely affected the health and vigor of agricultural crops was it provided a rare opportunity to examine the fractured, creviced, and buried bedrock surface of northwestern Illinois. Complex vegetated networks, referred to as ‘crop lines’, began to appear across the dry summer landscape of Jo Daviess County, Illinois, including adjacent western Stephenson County and southwestern Wisconsin. Primarily confined to alfalfa hay fields, the vegetated crop lines resulted from a combination of three factors: 1) the persistent extremely dry conditions, 2) a relatively thin (3 to 5 feet) overburden of unconsolidated deposits, and 3) a highly fractured and creviced bedrock surface comprised of Ordovician age Galena Dolomite.Alfalfa’s vigorous root system, which may ultimately extend to depths of 6.1 m (20 feet) or more, enables it to obtain water and nutrients moving through bedrock crevices near the top of the karst aquifer, providing the necessary moisture during the 2012 summer drought to sustain the overlying healthy alfalfa plants, whereas the remaining field area exhibited stunted and sparse plant growth. The alfalfa plants forming the crop lines tended to grow denser, taller (0.5 m vs. 0.15 m), and greener than those in adjacent areas, were clearly visible from vertical aerial photographs, and provided a visual representation of the bedrock fracture pattern below. Work on this project was funded by the Illinois State Geological Survey.The publications cited below provide background and context:Panno, S.V. and D.E. Luman. Assessment of the geology and hydrogeology of two sites for a proposed large dairy facility in Jo Daviess County near Nora, IL. Illinois State Geological Survey Open File Series 2008-2, 2008. https://library.isgs.illinois.edu/Pubs/pdfs/ofs/2008/ofs2008-02.pdf Panno, S.V., Philip G. Millhouse, Randy W. Nyboer, Daryl Watson, Walton R. Kelly, Lisa M. Anderson, Curtis C. Albert, and Donald E. Luman. Guide to the Geology, Hydrogeology, History, Archaeology, and Biotic Ecology of the Driftless area of Northwestern Illinois, Jo Daviess County. Illinois State Geological Survey Guidebook 42, 2016. https://www.isgs.illinois.edu/publications/gb042 Panno, S.V., Donald E. Luman, Walton R. Kelly, Timothy H. Larson, and Stephen J. Taylor. Karst of the Driftless Area of Jo Daviess County, Illinois. Circular 586, Illinois State Geological Survey, Prairie Research Institute, University of Illinois Urbana-Champaign, 2017. https://isgs.illinois.edu/maps/county-maps/karst-terrain/jo-daviess-0
Purpose: This dataset contains digitized bedrock crevice locations, a direct indicator of karst terrain, for Jo Daviess County, IL. The primary source data used for the digitizing was multitemporal aerial photography acquired from multiple sources during the period of June-October, 2012. This is one of several datasets compiled for the Karst Feature Database of Jo Daviess County, IL and hosted by the U.S. Fish & Wildlife Service.
Supplemental Information: Please see metadata under each individual feature layer and table for more information. Croplines can reveal crevice and fracture patterns present in bedrock. These lines are only visible during drought conditions and only in areas with very shallow soils where alfalfa is grown. Non-detection of croplines does not imply the lack of fractures and crevices in bedrock.
Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date: 20120601
Ending Date: 20121031
Currentness Reference: The area of Daviess County, Illinois, including adjacent western Stephenson County, Illinois and Lafayette County in southwestern Wisconsin.
Status:
Progress: Complete
Maintenance and Update Frequency: None planned
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -90.6766
East Bounding Coordinate: -88.9572
North Bounding Coordinate: 42.6138
South Bounding Coordinate: 41.9514
Keywords:
Theme:
Theme Keyword Thesaurus: None
Theme Keyword: Illinois
Theme Keyword: Jo Daviess County
Theme Keyword: Environment
Theme Keyword: Water Quality
Theme Keyword: Bedrock Crevices
Theme Keyword: Remote Sensing
Theme Keyword: Aerial Photography
Theme Keyword: 2012 Drought
Theme Keyword: Agricultural Fields
Theme Keyword: Imagery & Base Maps
Theme Keyword: Earth Cover
Theme Keyword: Geoscientific Information
Theme Keyword: Karst
Access Constraints: Other Constraints
Use Constraints: The United States Fish and Wildlife Service (Service) shall not be held liable for improper or incorrect use of the data described and/or contained herein. While the Service makes every reasonable effort to ensure the accuracy and completeness of data provided for distribution, it may not have the necessary accuracy or completeness required for every possible intended use. The Service recommends that data users consult the associated metadata record to understand the quality and possible limitations of the data. The Service creates metadata records in accordance with the standards endorsed by the Federal Geographic Data Committee.As a result of the above considerations, the Service gives no warranty, expressed or implied, as to the accuracy, reliability, or completeness of the data. It is the responsibility of the data user to use the data in a manner consistent with the limitations of geospatial data in general and these data in particular. Although these data have been processed successfully on a computer system at the Service, no warranty, expressed or implied, is made regarding the utility of the data on another system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This applies to the use of the data both along and in aggregate with other data and information.
Data Set Credit: U.S. Fish and Wildlife Service Illinois State Geological Survey, Prairie Research Institute, University of Illinois Urbana-Champaign League of Women Voters of Jo Daviess County, League of Women Voters of Illinois Education Fund
Metadata Reference Information:
Metadata Date: 20210812
Metadata Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: Illinois State Geological Survey
Contact Person: Donald Luman and Samuel Panno
Contact Position: ISGS Affiliate
Contact Address:
Address Type: mailing and physical
Address: 615 East Peabody Drive
City: Champaign
State or Province: IL
Postal Code: 61820-6964
Country: US
Contact Voice Telephone: 217-244-2179; 217-244-2456
Contact Electronic Mail Address: luman@illinois.edu; s-panno@illinois.edu
Metadata Standard Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata Standard Version: FGDC-STD-001-1998
Metadata Time Convention: local time