A possible diapir in the Laurentian Channel

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Abstract
Seismic reflection studies in the Laurentian Channel have located a structure, which may be a diapiric salt intrusion, at 45° 12′ N, 57° 07′ W. It occurs over the eastern end of a part of the region of low, free-air gravity anomalies, which extends from eastern Nova Scotia. It is reasonable to suppose that the structure is a diapiric salt intrusion; evaporites have been reported in one drill hole to the east, on the Grand Banks. If so, this confirms the interpretation of the gravity anomalies by Loncarevic and Ewing. A reflection profile across the whole channel does not support the view that the present form of this part of it is of structural origin.

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