Anthony (Contractor) J Arnold

High-resolution (1m) backscatter from the Stamp Sands of Lake Superior collected using a Norbit iWBMSh multibeam echosounder during 2021 (GeoTIFF, UTM Zone 16N, NAD 83, NAVD 88)

The erosion and active transport of legacy mine tailings (called “stamp sands”) are impacting native fish species and aquatic habitats on a shallow water rocky reef complex along the Keweenaw Peninsula of Michigan called Buffalo Reef. Stamp sands are spreading from an old mill site at the Town of Gay and settling on the reef. Multiple surveys have documented the underwater migration of toxic, metal-rich stamp sands and progressive burial of areas of hard/complex lakefloor, such as cobble fields. The finer-grained, muddy fraction of the mine tailings has been winnowed by waves and currents and transported to unknown locations in deeper waters offshore. High-resolution geophysical mapping of the bay in 2018 revealed...

Tags: Buffalo Reef, DOI, Department of the Interior, GLSC, GeoTIFF, All tags... Grand Traverse Bay, Great Lakes Science Center, Houghton County, Keweenaw County, Keweenaw Peninsula, Lacustrine Geology, Lake Superior, Norbit echo sounder, R/V Desmid, R/V Rafael, State of Michigan, backscatter, bathymetry, bathymetry, field activity number 2021-005-FA, geophysics, geospatial datasets, iWBMSh, lakebed characteristics, multibeam backscatter, multibeam bathymetry, multibeam echosounder, multibeam sonar, sea-floor acoustic reflectivity, Fewer tags

Multibeam bathymetric trackline data collected from the Stamp Sands of Lake Superior using a Norbit iWBMSh multibeam echosounder during 2021 (Esri polyline shapefile, UTM Zone 16N, NAD 83)

The erosion and active transport of legacy mine tailings (called “stamp sands”) are impacting native fish species and aquatic habitats on a shallow water rocky reef complex along the Keweenaw Peninsula of Michigan called Buffalo Reef. Stamp sands are spreading from an old mill site at the Town of Gay and settling on the reef. Multiple surveys have documented the underwater migration of toxic, metal-rich stamp sands and progressive burial of areas of hard/complex lakefloor, such as cobble fields. The finer-grained, muddy fraction of the mine tailings has been winnowed by waves and currents and transported to unknown locations in deeper waters offshore. High-resolution geophysical mapping of the bay in 2018 revealed...

Tags: Buffalo Reef, Buffalo Reef, DOI, Department of the Interior, GLSC, All tags... Grand Traverse Bay, Great Lakes Science Center, Houghton County, Houghton County, Keweenaw County, Keweenaw County, Keweenaw Peninsula, Keweenaw Peninsula, Lacustrine Geology, Lake Superior, Lake Superior, Michigan, Norbit echo sounder, R/V Desmid, R/V Rafael, State of Michigan, Traverse Bay, United States of America, field activity number 2021-005-FA, geospatial datasets, multibeam echosounder, multibeam sonar, navigational data, shapefile, tracklines, Fewer tags

High-resolution (1m) bathymetry from the Stamp Sands of Lake Superior collected using a Norbit iWBMSh multibeam echosounder during 2021 (GeoTIFF, UTM Zone 16N, NAD 83, NAVD 88)

The erosion and active transport of legacy mine tailings (called “stamp sands”) are impacting native fish species and aquatic habitats on a shallow water rocky reef complex along the Keweenaw Peninsula of Michigan called Buffalo Reef. Stamp sands are spreading from an old mill site at the Town of Gay and settling on the reef. Multiple surveys have documented the underwater migration of toxic, metal-rich stamp sands and progressive burial of areas of hard/complex lakefloor, such as cobble fields. The finer-grained, muddy fraction of the mine tailings has been winnowed by waves and currents and transported to unknown locations in deeper waters offshore. High-resolution geophysical mapping of the bay in 2018 revealed...

Tags: Buffalo Reef, DOI, Department of the Interior, GLSC, GeoTIFF, All tags... Grand Traverse Bay, Great Lakes Science Center, Houghton County, Keweenaw County, Keweenaw Peninsula, Lacustrine Geology, Lake Superior, Norbit echo sounder, R/V Desmid, R/V Rafael, State of Michigan, backscatter, bathymetry, bathymetry, field activity number 2021-005-FA, geophysics, geospatial datasets, iWBMSh, lakebed characteristics, multibeam backscatter, multibeam bathymetry, multibeam echosounder, multibeam sonar, sea-floor acoustic reflectivity, Fewer tags

High-resolution (0.5m) backscatter from the Stamp Sands of Lake Superior collected using a Norbit iWBMSh multibeam echosounder during 2021 (GeoTIFF, UTM Zone 16N, NAD 83, NAVD 88)

The erosion and active transport of legacy mine tailings (called “stamp sands”) are impacting native fish species and aquatic habitats on a shallow water rocky reef complex along the Keweenaw Peninsula of Michigan called Buffalo Reef. Stamp sands are spreading from an old mill site at the Town of Gay and settling on the reef. Multiple surveys have documented the underwater migration of toxic, metal-rich stamp sands and progressive burial of areas of hard/complex lakefloor, such as cobble fields. The finer-grained, muddy fraction of the mine tailings has been winnowed by waves and currents and transported to unknown locations in deeper waters offshore. High-resolution geophysical mapping of the bay in 2018 revealed...

Tags: Buffalo Reef, DOI, Department of the Interior, GLSC, GeoTIFF, All tags... Grand Traverse Bay, Great Lakes Science Center, Houghton County, Keweenaw County, Keweenaw Peninsula, Lacustrine Geology, Lake Superior, Norbit echo sounder, R/V Desmid, R/V Rafael, State of Michigan, backscatter, bathymetry, bathymetry, field activity number 2021-005-FA, geophysics, geospatial datasets, iWBMSh, lakebed characteristics, multibeam backscatter, multibeam bathymetry, multibeam echosounder, multibeam sonar, sea-floor acoustic reflectivity, Fewer tags

High-resolution (0.5m) bathymetry from the Stamp Sands of Lake Superior collected using a Norbit iWBMSh multibeam echosounder during 2021 (GeoTIFF, UTM Zone 16N, NAD 83, NAVD 88)

The erosion and active transport of legacy mine tailings (called “stamp sands”) are impacting native fish species and aquatic habitats on a shallow water rocky reef complex along the Keweenaw Peninsula of Michigan called Buffalo Reef. Stamp sands are spreading from an old mill site at the Town of Gay and settling on the reef. Multiple surveys have documented the underwater migration of toxic, metal-rich stamp sands and progressive burial of areas of hard/complex lakefloor, such as cobble fields. The finer-grained, muddy fraction of the mine tailings has been winnowed by waves and currents and transported to unknown locations in deeper waters offshore. High-resolution geophysical mapping of the bay in 2018 revealed...

Tags: Buffalo Reef, DOI, Department of the Interior, GLSC, GeoTIFF, All tags... Grand Traverse Bay, Great Lakes Science Center, Houghton County, Keweenaw County, Keweenaw Peninsula, Lacustrine Geology, Lake Superior, Norbit echo sounder, R/V Desmid, R/V Rafael, State of Michigan, backscatter, bathymetry, bathymetry, field activity number 2021-005-FA, geophysics, geospatial datasets, iWBMSh, lakebed characteristics, multibeam backscatter, multibeam bathymetry, multibeam echosounder, multibeam sonar, sea-floor acoustic reflectivity, Fewer tags