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TitleSeismic study of ridges on the lake floor in Rochester Basin, eastern Lake Ontario, New York: evidence for till composition
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorCoflin, K C; Phu, B; Lewis, C F MORCID logo; Todd, B JORCID logo
SourceGeological Survey of Canada, Open File 8178, 2017, 1 sheet, Open Access logo Open Access
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
File formatpdf
ProvinceOffshore region; Ontario
NTS30N/10; 30N/11
AreaLake Ontario; New York State; United States of America; Canada
Lat/Long WENS -77.0833 -76.9667 43.6167 43.5000
Subjectsgeophysics; marine geology; surficial geology/geomorphology; lakes; geophysical surveys; seismic surveys, lake; seismic reflection surveys; glacial deposits; tills; till ridges; glacial features; drumlins; glaciolacustrine deposits; lacustrine deposits; clays; bedrock topography; Rochester Basin; data processing; diamicton; Phanerozoic; Cenozoic; Quaternary
Illustrationslocation maps; seismic profiles; spectra; graphs
ProgramGroundwater Geoscience, Aquifer Assessment & support to mapping
Released2017 03 21
Summary(Plain Language Summary, not published)
The seismic reflection data analysed in this study were collected in Rochester Basin in eastern Lake Ontario in 1994. The data subset shown here provides a cross section of a number of ridges on the lake floor. Previous authors interpreted them as drumlins or as the result of bedrock faulting. Interpretation of the unprocessed seismic data could, erroneously, indicate that faulting occurred in the area. This study was conducted using processed seismic data to resolve the base of the ridges and to determine if faulting has occurred to cause their formation. Reflectors under the ridges were found to be continuous with no evidence of faulting. The analysis supports the interpretation that the ridges are drumlins.

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