Gravity domains and assembly of the North American continent by collisional tectonics

Details Gravity domains and assembly of the North American continent by collisional tectonics Gravity domains and assembly of the North American continent by collisional tectonics

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988natur.331..333t&link_type=abstract

Nature (ISSN 0028-0836), vol. 331, Jan. 28, 1988, p. 333, 334.

Physics

9

Earth Planetary Structure, Gravitational Fields, North America, Tectonics, Continental Shelves, Orography, Plates (Tectonics), Relief Maps, Structural Analysis

Scientific paper

A gravity trend map of North America, based on a horizontal Bouguer gravity gradient map produced from gravity data for Canada and the conterminous United States, is presented and used to define a continental mosaic of gravity trend domains akin to structural domains. Contrasting trend characteristics at gravity domain boundaries support the concept of outward growth of the continent primarily by accretionary tectonics. Gravity patterns, however, indicate a different style of tectonics dominated in the development of now-buried Proterozoic orogenic belts in the south-central United States, supporting a view that these belts formed along the leading edge of a southward-migrating Proterozoic continental margin.

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