Duncan Canal (volcanic field)

The Duncan Canal volcanic field is a poorly defined and little-studied area of Quaternary volcanism located in Southeast Alaska, United States. It lies within the Tongass National Forest, near the communities of Petersburg and Wrangell. The field is characterized by a cluster of small cinder cones, lava flows, and potentially maars, although detailed geological mapping is limited. Its composition is generally basaltic, reflecting a mantle source.

Due to the remote location and heavy vegetation cover, precise dating of volcanic activity is challenging, but evidence suggests eruptions occurred during the Pleistocene and Holocene epochs. The volcanic field's origin is likely related to regional tectonic activity, possibly associated with the Fairweather Fault system. Further research is needed to determine the full extent of the volcanic field, its eruptive history, and potential hazards. Currently, given its remoteness and infrequent eruptive style (if any recent activity exists), it poses a relatively low risk to human populations.