Presentation Title: Origins of the Moretown Formation, Vermont: a Detrital Zircon Study
Section: Poster Session Group 1 #20
Location: McCardell Bicentennial Hall, Great Hall
Date & Time: Friday, April 19, 2013 - 10:30am - 11:15am
The tectonic history of the Vermont Appalachians can be refined with the aid of geochronological data. The Moretown Formation of Vermont has been interpreted as sediments deposited in the fore-arc basin of the Cambrian-Ordovician Shelburne Falls arc. This study uses detrital zircons to provide new information on the provenance of the Moretown sediments. U-Pb ages of zircons separated from nine samples taken from the Moretown Formation of northern Vermont were determined using the LA-ICP-MS at Rensselaer Polytechnic Institute. The age signatures of the Moretown, and some rift-related sediments of Vermont, are compared to age signatures of potential source regions. Results from Moretown samples suggest a peri-Gondwanan source component, likely mixed with a Laurentian component, suggesting more provenance sources than the exclusively Laurentian signature postulated by previous work on the Moretown in southern Vermont and northern Massachusetts. Such a distinction could indicate that the Moretown is not the same along strike.
Type of Presentation: Individual poster
Presentation Area: Geology
Number of presenters:
Presenter(s): Ryan-Davis, Juliet Rose
Class Year(s): 2013
Sponsor(s): Coish, Ray, Amidon, William H.