Abstract
The present lack of volcanic activity in the Western Aleutian Arc correlates with the lack of underthrusting at the western Aleutian trench predictable by plate tectonic theory. A simple plate model allows one to predict that another plate (Kula plate) and a spreading ridge (Kula ridge) lay south of the arc in early Tertiary time and that the Aleutian trench consumed the ridge in the middle Tertiary. Early Tertiary volcanism in the Western Aleutians may be related to underthrusting by the Kula plate. A mid-Tertiary orogeny in the Central Aleutians and a late Tertiary orogeny in Alaska may be related to the subduction of the Kula ridge.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
