Atlantic Continental Shelf and Slope of the United States - Gravels of the northeastern part

Schlee, John Stevens; Pratt, Robert G.

doi:10.3133/pp529h

Cited by 44 publications

(45 citation statements)

References 20 publications

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“…2-12a), which is consistent with the regional pattern observed on the shelf (Schlee, 1973). The samples between the 100 and 200-m isobath, however,…”

Section: Surface Sediment Texturesupporting

confidence: 77%

“…The present distribution of sediments in the Georges Bank region reflects their glacial source and reworking by currents and waves during and since the last rise in sea level (Schlee, 1973;Bothner and others, 1981;Twichell and others, 1981;Twichell, 1983 Figure 2-11. Bathymetric sections across the axis of Lydonia Canyon through selected mooring locations (station name on right side).…”

Section: Surface Sediment Texturementioning

confidence: 99%

“…Along the east coast of the United States, the texture of the surficial sediment changes rapidly from primarily sand to silt and clay just seaward of the shelfbreak (Stanley et al, 1983;Schlee, 1973), indicating a change from an active sedimentary environment on the shelf to a more tranquil depositional environment on the upper slope. Csanady and Shaw (1983) have suggested that because of the relatively weak currents on the slope, this region may be a sink for fine-grained particles.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

North Atlantic Slope and Canyon Study; Volume 2

Butman¹

1988

Open-File Report

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“…2-12a), which is consistent with the regional pattern observed on the shelf (Schlee, 1973). The samples between the 100 and 200-m isobath, however,…”

Section: Surface Sediment Texturesupporting

confidence: 77%

Section: Surface Sediment Texturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

North Atlantic Slope and Canyon Study; Volume 2

Butman¹

1988

Open-File Report

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“…3c). The features shown in the multibeam image are the first physiographic evidence that early interpretations of the extent of glacial advance onto this part of Georges Bank, which were based only on the distribution of gravel and coarse sand, are correct (Schlee 1973;Schlee & Pratt 1970).…”

Section: Georges Bankmentioning

confidence: 95%

Submarine glacial landforms on the Bay of Fundy–northern Gulf of Maine continental shelf

Todd

Shaw

Valentine

2016

Memoirs

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“…BP (KAYE, 1964), the margin of the Laurentide ice sheet retreated across the Gulf of Maine from its maximum extent on the continental shelf (SCHLEE and PRATT, 1970;TUCHOLKE and HOLLISTER, 1973) and passing parallel to and across the present Maine coastal zone about 13,200 yrs. BP accompanied by a marine invasion (BORNS, 1973;STUIVER and BORNS, 1975).…”

Section: Current Understandingmentioning

confidence: 99%

The implications of the Pineo Ridge readvance in Maine

Borns

Hughes

2011

gpq

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Much of the Laurentide ice sheet in Maine, Atlantic Provinces, and southern Quebec was a "marine ice sheet," that is it was grounded below the prevailing sea level. When proper conditions prevailed, calving bays progressed into the ice sheet along ice streams partitioning it, leaving those portions grounded above sea level as residual ice caps. At least by 12,800 yrs. BP a calving bay had progressed up the St. Lawrence Lowland at least to Ottawa while a similar, but less extensive calving bay developed in Central Maine at approximately the same time. Concurrently, ice draining north into the St. Lawrence and south into the Central Maine calving bays rapidly lowered the surface of the intervening ice sheet until it eventually divided over the NE-SW trending Boundary and Longfellow Mountains and probably over other highland areas as well. A major consequence of these nearly simultaneous processes was the separation of an initial large ice cap over part of Maine, New Brunswick, and Québec which was bounded on the west by the calving bay in Central Maine, to the north by the calving bay in the St. Lawrence Lowland, to the south by the Bay of Fundy, and to the east by the Gulf of St. Lawrence. In coastal Maine, east of the calving bay, the margin of the ice cap receded above the marine limit at least 40 km and subsequently read-vanced terminating at Pineo Ridge moraine approximately 12,700 yrs. BP. These events are the stratigraphie and chronologic equivalent of the Cary-Pt. Huron recession/Pt. Huron readvance of the Great Lakes region.La plus grande partie de l’inlandsis laurentidien qui couvrait le Maine, les Maritimes et le sud du Québec était une « calotte glaciaire marine », sa base étant sous le niveau marin de l’époque. Les conditions le permettant, des baies de vêlage se sont développées le long de courants de glace et ont morcelle la calotte, si bien que les parties au-dessus du niveau de la mer sont devenues des calottes résiduelles. Vers 12 800 ans BP une baie de vêlage a occupé les basses terres du Saint-Laurent jusqu’à Ottawa. En même temps, une baie plus petite se développait dans le centre du Maine. Le drainage simultané de la glace, au nord, dans la baie de vêlage du Saint-Laurent et, au sud, dans celle du Maine a abaissé la surface de la calotte glaciaire jusqu’à ce qu’elle se divise le long des monts frontaliers et Longfellow (NE-SO) ainsi qu’en d’autres régions de hautes terres. Cette calotte glaciaire, d’abord très étendue, a donc été isolée au-dessus d’une partie du Maine, du Québec et du Nouveau-Brunswick. Elle était limitée à l’ouest par la baie de vêlage du centre du Maine, au nord par celle des basses terres du Saint-Laurent, au sud par la baie de Fundy et à l’est par le golfe du Saint-Laurent. Dans la région côtière du Maine, à l’est de la baie de vêlage, la marge glaciaire a reculé au-dessus de la limite marine sur au moins 40 km, puis a réavancé jusqu’à la moraine de Pineo Ridge vers 12 700 BP. Ces événements sont les équivalents stratigraphiques et chronologiques de la récession de Cary-Po...

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Atlantic Continental Shelf and Slope of the United States - Gravels of the northeastern part

Cited by 44 publications

References 20 publications

North Atlantic Slope and Canyon Study; Volume 2

North Atlantic Slope and Canyon Study; Volume 2

Submarine glacial landforms on the Bay of Fundy–northern Gulf of Maine continental shelf

The implications of the Pineo Ridge readvance in Maine

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