Geologic mapping of two 7.5-minute quadrangles in north central arkansas and digitization of water well dataproject period: 7 01 2023 - 06 30 202PURPOSE: this project builds on previous mapping by the…

Geologic mapping of two 7.5-minute quadrangles in north central arkansas and digitization of water well dataproject period: 7 01 2023 - 06 30 202PURPOSE: this project builds on previous mapping by the AGS for statemap (2011-2016) and earth MRI (2019-2021). To the north and west, the sylamore, mountain view, prim, and brownsville quadrangles were previously mapped through statemap projects. On the north and east, the guion, mount pleasant, and bethesda quadrangles were mostly mapped by earth MRI with the remainder finished last year by statemap. The proposed mapping area is a good fit with the strides made by these previous projects.activities:determine the extent of critical minerals aid source water protection in the white river and greers ferry lake watersheds help improve resolution of geologic units by dividing units that were previously grouped differentiate carbonate and terrigenous units begin an inventory of karst features. Determine which units are susceptible to landslides describe surface units that are of scientific interest for gas and other resource development address stratigraphic and structural issues and update nomenclaturedeliverables:criteria 1DIGITAL geologic maps of the marcella, drasco, and greers ferry DAM 1:24,000-scalequadrangles in .PDF format and map data in a gems level 3-compliant database will be deliveredvia the national cooperative geologic mapping program (NCGMP) management systemby june 30, 2023.criteria 11A database of downhole stratigraphic data from water wells derived from AGS recordswill be delivered to the NCGMP via the gems web form