Paper handled by Editor-in-Chief Ali Polat.

We are very grateful to Russell (2019) for the opportunity to expand on the significance of ice streaming in Southern Ontario at the end of the last glaciation and to place that work in a broader glacial geological context of what is known of the paleoglaciology of former ice sheets.

Taylor (1913) is credited with recognizing the interlobate origin of the Oak Ridges Moraine (ORM), which has long been accepted (see Barnett 1992; Barnett et al. 1998 and many references therein). Sookhan et al (2018a) identified the converging lobes either side...

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