Middlebury

 

Presentation Title: Origins of the Moretown Formation, Vermont: a Detrital Zircon Study

Section: Poster Session Group 1 #20

Location: , Great Hall

Date & Time: Friday, April 19, 2013 - 10:30am - 11:15am

Abstract:

  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

Oral presenters
Presentation Area: Geology

Presentation Topic: NA

Arts presenters
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Class Project
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Presenter Information
Presenter(s): Ryan-Davis, Juliet Rose
Major(s): Geology
Class Year(s): 2013

Sponsor(s): Coish, Ray, Amidon, William H.
Dept(s): Geology

Moderator: ,