Fragments of artifacts made from similar fine-grained
redstone have been found at other Caborn-Welborn sites and have
been identified as catlinite. This material was possibly traded
from a source area in southern Minnesota.
Redstone pipes more than three times larger than
Hovey Lake site pipe (3.75cm diameter disk) have been reported from
other Caborn-Welborn villages. The disk pipe form is most common
among the Oneota cultures of the Upper Mississippi Valley, in
Iowa, Wisconsin, and Illinois, and rare elsewhere in the Midwest,
except in the Caborn-Welborn culture.
Trade in redstone/catlinite was part of a system
of exchange of high quality materials that flourished in the Midwest
around A.D. 1450-1650. Other trade included finished products and
raw materials - ceramic vessels, marine shell ornaments, pieces
of fluorite and galena, and large blanks or finished hoe blades