See the Mississippi Shift Like A Snake
This map beautifully captures the changeable course of the Big River
From a young age, Frank was fascinated by maps and atlases, and the stories they contained. Finding his birthplace on the map in the endpapers of Tolkien's Lord of the Rings only increased his interest in the mystery and message of maps.
While pursuing a career in journalism, Frank started a blog called Strange Maps, as a repository for the weird and wonderful cartography he found hidden in books, posing as everyday objects and (of course) floating around the Internet.
"Each map tells a story, but the stories told by your standard atlas for school or reference are limited and literal: they show only the most practical side of the world, its geography and its political divisions. Strange Maps aims to collect and comment on maps that do everything but that - maps that show the world from a different angle".
A remit that wide allows for a steady, varied diet of maps: Frank has been writing about strange maps since 2006, published a book on the subject in 2009 and joined Big Think in 2010. Readers send in new material daily, and he keeps bumping in to cartography that is delightfully obscure, amazingly beautiful, shockingly partisan, and more.
As rivers go, the Mississippi is one of the world’s biggies. It’s 3.734 km (2.320 mi) long and has a watershed of more than 3.2 million sq. km (1,245,000 sq. mi), the third-largest in the world, preceded only by the Amazon and Congo rivers. The Mississippi watershed drains 41% of the 48 contiguous states, and even a bit of Canada as well. By volume, it’s the fifth-largest river in the world. And yet, the Mississippi isn’t even North America’s longest river: that is the Missouri River.
The western border of the Mississippi’s catchment area corresponds almost entirely with the border of the former French territory of Louisiana, indicating that the watershed boundary was chosen as the basis for that territory’s borders.
Water flowing out from its headwaters at Lake Itasca in Minnesota will take 90 days to reach its estuary into the Gulf of Mexico at Baton Rouge in Louisiana. In, 2002, Slovenian long-distance swimmer Martin Strel covered that same distance in 68 days, so only doing 22 days’ net worth of swimming – the lazy slacker.
The Mississippi’s effluent of fresh water is so massive (7,000 to 20,000 m³/sec, or 200,000 to 700,000 ft³/sec) that a plume of fresh Mississippi water is detectable from outer space, even as it rounds Florida and up to the coast of Georgia.
The Mississippi was named by the Ojibwe, who appropriately called it the ‘Great River’ (misi-ziibi). Nowadays, it flows through two US states and forms the border of eight others; although the river has shifted in many places, the borders have not, leading to geo-political anomalies (see post #178 on the Kentucky Bend, one of several such peculiarities ‘marooned’ by the river).
When looking at this map and seeing the jumble of ancient riverbeds – imagine all those shifts sped up: the Mississippi is like a shifting snake, twisting to find its easiest way down to the Gulf. These shifts occur every thousand years or so, especially in the lower parts of the river, through a process known as avulsion, or delta switching: when the river flow is slow, the sedimentation clogs the river channel and it eventually finds another channel. This process is by no means over – from the 1950s onwards, the US government has worked on the Old River Control Structure, meant to prevent the Mississippi from switching to the Atchafalaya River channel.
Some other interesting Mississippi facts:
“Looks like a spaghetti dinner brought to you by Crayola,”says Joseph Kinyon of the map he sent in. It’s one of many by Harold N. Fisk, an important figure in charting alluvial maps of the Lower Mississippi Valley.
Strange Maps #208
Got a strange map? Let me know at email@example.com.
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