Geological Research at the IGS
||Jun 26, 2017
||Jun 25, 2018
Carroll, Cass, Fulton, Howard, Jasper, Miami, Pulaski, Tippecanoe, White
||Jose Luis Antinao
U.S. Geological Survey (USGS) - STATEMAP Program
||The 1:000,000-scale Logansport quadrangle is located in north-central Indiana and overlies the northwestern portion of the Silurian-Devonian bedrock aquifer, yet little is known about the properties of the aquifer in this area. The Silurian and Devonian carbonates are also a primary source of construction aggregate in the area. Several of the reefs in the study area are composed of high-calcium lime, prized for its value to the steel industry.
||The primary goal of mapping the Logansport quadrangle is to gain new understanding of the Silurian-Devonian bedrock aquifer and to generate a 3-D framework of quantified rock properties for direct application by a spectrum of users.
||The Logansport quadrangle will be mapped as a two-year effort. Year 1 of 2 is dedicated to mapping the bedrock geology of the southern half of the quadrangle (fig. 11). Our study will include the stratigraphic interval from the basal portion of the Mississippian Borden Group at the top to the Ordovician Maquoketa Group at the base. The maximum thickness of this interval in the study area is estimated to be 800 ft. Our approach to mapping the subsurface geology of the study area will draw heavily upon archived logs and sample sets. Applying an integrated chronostratigraphic approach to mapping will yield new insights into depositional models central to interpolating map surfaces.
||This project will deliver a preliminary bedrock geologic map for the southern half of the 1:100,000-scale Logansport quadrangle as an interim product (year 1 of 2). The final map for the entire quadrangle will be delivered at the end of year 2 (May, 2019).
||The results of this study will directly useful to other IGWS staff and also land-use planners (particularly near the cities of Lafayette, Kokomo, and Logansport), water utilities, the aggregate industry, regional carbon sequestration consortiums (particularly in the Michigan Basin), and those engineering large geothermal systems in the region.