Links
- More information: Publisher Index Page
- Download citation as: RIS | Dublin Core
Abstract
Seismic-reflection data were collected in the 1980s as part of the Great Lakes International Multidisciplinary Program on Crustal Evolution (GLIMPCE) to investigate the 1.1 Ga Midcontinent Rift System (MRS). GLIMPCE Line C crosses western Lake Superior from north to south shores (Fig. 1 inset). Many previous workers have interpreted the MRS in Line C as an asymmetric central graben filled with 10–20 km of subaerial basalt flows, overlain by 7-10 km of sedimentary section, and underlain by magmatic underplating. The central graben was interpreted to have formed from extensional normal faults, later reactivated as high-angle reverse faults. The northern part of Line C crosses over a prominent gravity low called the Grand Marais Ridge (GMR; Fig. 1 inset), previously interpreted as an Archean granitic basement high.
Study Area
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | Exploring the geology of the Midcontinent Rift under western Lake Superior using a preliminary velocity model of seismic line GLIMPCE C |
| Year Published | 2023 |
| Language | English |
| Publisher | Institute on Lake Superior Geology |
| Contributing office(s) | Geology, Geophysics, and Geochemistry Science Center |
| Description | 2 p. |
| Larger Work Type | Book |
| Larger Work Subtype | Conference publication |
| Larger Work Title | Proceedings of the 69th ILSG annual meeting |
| First page | 37 |
| Last page | 38 |
| Conference Title | Institute on Lake Superior Geology 69th Annual Meeting |
| Conference Location | Eau Claire, WI |
| Conference Date | April 23-24, 2023 |
| Country | United States |
| Other Geospatial | Lake Superior |
| Google Analytic Metrics | Metrics page |