A Geoscience Digital Image Library

TitleBlack beach and cross-bedded and jointed sandstone (quartzite) of the North Shore Volcanic Group
DescriptionJointed and cross-bedded sandstone (quartzite) of the North Shore Volcanic Group exposed along Lake Superior shoreline, Leif Ericson Park, Duluth, St. Louis County, Minnesota. Rubble beach consists of basalts and other Late Proterozoic volcanics and sandtones. The primarily basaltic finer-grained sediments produce a black sand beach.
ChronostratigraphyLate Proterzoic, Keweenawan
LithostratigraphyNorth Shore Volcanic Group
Geologic provinceMidcontinent Rift
LocationUSA ▹ Minnesota ▹ St. Louis. Near Duluth. Duluth Quadrangle.
PhotographerJoseph Hartman. 2002-02-21.
CollectionJoseph Hartman C08847.
Key wordsjoints, black sand beach
Tech details560 KB. Outcrop. Kodachrome, TIFF.
GeoDIL number2413