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Rifting in Finland

1 860 million years – 1.7 kilometres

Quartzite, aka metamorphosed sandstone. (

The motion of lithosphere plates changes directions causing a stretching motion that forms large sedimentary basins in Finland. One example of these basins is the old sandstone of Tiirismaa in Hollola.

Image: Metamorphic sandstonw or quartzite. Mikko Turunen,

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