Formula: SrAl3(PO4)(SO4)(OH)6 Hexagonal Description: Svanbergite forms as a result of medium-grade metamorphism of aluminum-rich sediments.. SAUK COUNTY: Microscopic grains of svanbergite occur in metapelite layers within the Baraboo Quartzite where it is associated with pyrophyllite, quartz, hematite, and …
Sauk County
Tourmaline Group
Formula: Na(Al,Fe,Li,Mg,Mn)3(Al,Cr,V,Fe)6(BO3)3Si6O18(O,OH,F)4 Hexagonal Description: Tourmaline var elbaite Animikie Red Ace pegmatite (red) showing comb texture in pegmatite wall zone. With altered Cs-beryl (yellow-green). Near Fern, Florence County, Wisconsin. (Photo by Al Falster.) Tourmaline is a complex group of …
Zircon
Formula: ZrSiO4 Tetragonal Description: Zircon in tabular crystal from the Nine Mile Pluton near Wausau in Marathon County, Wisconsin. Scanning electron microscope image. (Photo by Al Falster.) Zircon is a common accessory mineral found in many different …
Building Up Baraboo: A New Geologic Map of the Baraboo Hills
Mel Reusche, WGNHS Communications and outreach specialist Devil’s Lake State Park is one of many geologic marvels dotted around the oval-shaped footprint of the Baraboo Range that are explored by millions of visitors each year. …
Depth to Silurian bedrock in Eastern Wisconsin
This Data Series is a depth-to-bedrock product for a large portion of eastern WI where Silurian dolomite is the uppermost bedrock. An online version of the map can be found here. This map can …
Water Quality in the Chequamegon-Nicolet National Forest
This project in the Chequamegon-Nicolet National Forest was led by State Geologist Sue Swanson with WGNHS hydrogeologists G. Graham and Peter Chase, and is a collaboration with United States Forest Service. This data series …
New Water Table Datasets for Chippewa and Dunn Counties
Digital versions of water table maps have been appended to two existing publications, originally authored by Irene Lippelt in 1988: Generalized Water-Table Elevation of Dunn County, Wisconsin and Generalized Water-Table Elevation of Chippewa County, …
Wisconsin Groundwater-Level Monitoring Network Improvements, 2020-2022
This report documents work completed as part of a grant from the U.S. Geological Survey’s National Groundwater Monitoring Network (NGWMN) program. It provides an overview of the Wisconsin Groundwater-Level Monitoring Network (WGLMN) and provides …
Bedrock Geology of Jefferson County, Wisconsin
Located in southeast Wisconsin, Jefferson County is almost entirely blanketed by sediments that were delivered or shaped by the ice sheet that covered this area during the last ice age. New mapping interprets the …
Geologic Map of the Highland West and Highland East 7.5-Minute Quadrangles, Grant and Iowa Counties, Wisconsin
The geologic map of the Highland West and Highland East 7.5-minute quadrangles includes 1:24,000-scale mapping of both surficial and bedrock geology. Highland was a long-lived and important sub-district of the Upper Mississippi lead-zinc mining …