Glacial striations

Thanks! These features are very common where there's been recent glaciation, so I'm not surprised to hear they're in Montreal. Not much glaciation down your way since the end of the Paleozoic! I've heard, tho, that there are striations preserved on other pieces of Gondwanaland, in India and South Africa in particular, where they're now coming directly out of the sea. This was the sort of evidence that made southern hemisphere geologists much more receptive to the idea of continental drift, decades before plate tectonics.