Accession Number : AD0787562

Title :   The Nature of Triassic Continental Rift Structures in the Gulf of Maine.

Descriptive Note : Technical rept.,

Corporate Author : WOODS HOLE OCEANOGRAPHIC INSTITUTION MASS

Personal Author(s) : Ballard,Robert D.

Report Date : OCT 1974

Pagination or Media Count : 135

Abstract : An interpretation of seismic reflection profiles made across the Gulf of Maine and Georges Bank reveal the region underwent a major period of crustal rifting during the Triassic period. Three rift systems are delineated and a detailed comparison is made between the three systems and the Triassic Neward series onshore. A stress-strain analysis of the Triassic fault pattern in the Gulf of Maine is made and observed structures and related stress conditions are related to a sequence of six tectonic episodes beginning with initial graben formation in Late Triassic and ending with regional collapse and the onset of geosynclinal deposition in Middle Jurassic to Early Cretaceous.

Descriptors :   *Maine Gulf, *Tectonics, Theses, Seismic reflection, Faults(Geology), Fundy Bay, Oceanic crust, Profiles, Bathymetry

Subject Categories : Geology, Geochemistry and Mineralogy

Distribution Statement : APPROVED FOR PUBLIC RELEASE