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Full-Text Articles in Physical Sciences and Mathematics
Sea-Cliff Erosion With Rising Sea-Level Along Shores Exposing Glacial Material In Atlantic Canada, Eric R. Force
Sea-Cliff Erosion With Rising Sea-Level Along Shores Exposing Glacial Material In Atlantic Canada, Eric R. Force
Eric R Force
Rapid retreat rates of sea cliffs exposing glacial material are a widespread problem, especially in Atlantic Canada, and one that will continue. Prediction of retreat rates at specific sites involves many variables, but a factor that has commonly been overlooked in such prediction is the slope of the bedrock surface under the glacial material. A glaciated bedrock platform is generally necessary to establish a stable situation of temporary equilibrium, and as sea- level rises, the bedrock slope determines the location of the new equilib- rium position. An example from Nova Scotia shows that bedrock slope is so low on some …
Provenance Of The Lower Carboniferous Horton Group, Petit-Degrat Island, Nova Scotia, As Revealed By Detrital Zircon Ages, Eric R. Force, Sandra M. Barr
Provenance Of The Lower Carboniferous Horton Group, Petit-Degrat Island, Nova Scotia, As Revealed By Detrital Zircon Ages, Eric R. Force, Sandra M. Barr
Eric R Force
A quartz sandstone bed in a dominantly conglomeratic section in the central part of the Lower Carboniferous Horton Group on Petit-de-Grat Island, offshore southern Cape Breton Island, Nova Scotia, contains detrital zircon grains with ages ranging from mid-Devonian to Archean. The similarity of the Devonian and Neoproterozoic age spectrum to ages of igneous units in the adjacent Avalonian Mira terrane, in particular the Coastal belt, indicates that it was the main source area. This interpretation is supported by the similarity of the Neoproterozoic and older detrital zircon age spectrum to that of the detrital zircon age spectrum in a Cambrian …
A Lower Carboniferous Two-Stage Extensional Basin Along The Avalon-Meguma Terrane Boundary: Evidence From Southeastern Isle Madame, Nova Scotia, Eric R. Force, Sandra M. Barr
A Lower Carboniferous Two-Stage Extensional Basin Along The Avalon-Meguma Terrane Boundary: Evidence From Southeastern Isle Madame, Nova Scotia, Eric R. Force, Sandra M. Barr
Eric R Force
ABSTRACT Anomalously thick and coarse clastic sedimentary successions, including over 5000 m of conglomerate, are ex- posed on Isle Madame off the southern coast of Cape Breton Island. Two steeply to moderately dipping stratigraphic packages are recognized: one involving Horton and lower Windsor groups (Tournasian–Visean); the other involving upper Windsor and Mabou (Visean–Namurian) groups. Also anomalous on Isle Madame are three long narrow belts of “basement” rocks, together with voluminous chloritic microbreccia and minor semi-ductile mylonite, which are separated from the conglomerate-dominated successions by faults. The angular relations between the cataclastic rocks and the conglomerate units, combined with the presence …