Elizabeth K Drewes-Todd
Science and Products
Date published: March 13, 2018
Status: Active Alaska Technical Data Unit - Field Records Archives
This project is designed to collect, inventory, preserve, and make available the records of USGS geologic and minerals work in Alaska. Materials are organized in two broad categories of records: (1) Project History files, which contain field notes, maps, and fossil reports; and (2) Geologic Subject files, containing unpublished materials, correspondence, and the Economic Minerals files. Access...
Contacts: Elizabeth K Drewes-Todd
Year Published: 2019
Ar-Ar age constraints on the timing of Havre Trough opening and magmatism
The age and style of opening of the Havre Trough back-arc system is uncertain due to a lack of geochronologic constraints for the region. 40Ar/39Ar dating of 19 volcanic rocks from across the southern Havre Trough and Kermadec Arc was conducted in three laboratories to provide age constraints on the system. The results are integrated and...
Wysoczanski, Richard; Leonard, Graham S.; Gilliam, James F.; Wright, Ian; Calvert, Andrew T.; McIntosh, William; Jicha, Brian; Gamble, John A; Timm, Christian; Handler, Monica; Drewes, Elizabeth Kathleen; Zohrab, AlexAttribution: Volcano Hazards Program Office