kettle river mn map Archives - ToursMaps.com ® http://toursmaps.com/tag/kettle-river-mn-map Tue, 28 Mar 2017 15:11:07 +0000 en-US hourly 1 https://wordpress.org/?v=6.0.5 Kettle River http://toursmaps.com/kettle-river.html http://toursmaps.com/kettle-river.html#respond Mon, 22 Aug 2016 13:22:53 +0000 http://toursmaps.com/?p=218720 Kettle River Geology Kettle River got its name from the kettles found along its course. Kettles, or potholes, form in soft sedimentary rocks, like the sandstone that makes up a riverbed. The holes begin when grains of sand or tiny pebbles act as grinders powered by swirling water to carve depressions in the rock. The kettles grow larger and larger as successively bigger grinders get caught in them. The sandstone in this region, known as Hinckley Sandstone, was formed in the bottom of a shallow, mid-continental sea during the Precambrian Era. Silica and sand accumulated in layers on the sea

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