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TitleSeismic study of ridges on the lake floor in Rochester Basin, eastern Lake Ontario, New York: evidence for till composition
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AuthorCoflin, K C; Phu, B; Lewis, C F M; Todd, B J
SourceGeological Survey of Canada, Open File 8178, 2017, 1 sheet, https://doi.org/10.4095/299647
Year2017
PublisherNatural Resources Canada
Documentopen file
Lang.English
Mediaon-line; digital
File formatpdf
ProvinceOffshore region; Ontario
NTS30N/10; 30N/11
AreaLake Ontario; New York State; United States; 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
ProgramAquifer Assessment & support to mapping, Groundwater Geoscience
Image
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.
GEOSCAN ID299647