Sault Ste. Marie, Michigan in the context of "Interstate 75 in Michigan"

Jacques Marquette SJ (French pronunciation: [ʒak maʁkɛt]; June 1, 1637 – May 18, 1675), sometimes known as Père Marquette or James Marquette, was a French Jesuit missionary who founded Michigan's first European settlement, Sault Sainte Marie, and later founded Saint Ignace. In 1673, Marquette, with Louis Jolliet, an explorer born near Quebec City, was the first European to explore and map the northern portion of the Mississippi River Valley.

The St. Marys River, sometimes written St. Mary's River, drains Lake Superior, starting at the end of Whitefish Bay and flowing 74.5 miles (119.9 km) southeast into Lake Huron, with a fall of 23 feet (7.0 m). For its entire length it is an international border, separating Michigan in the United States from Ontario, Canada.

The twin cities of Sault Ste. Marie, Ontario, and Sault Ste. Marie, Michigan, are connected across the St. Marys River by the Sault Ste. Marie International Bridge. The St. Marys Rapids are just below the river's exit from Lake Superior and can be bypassed by huge freight ships through the man-made Soo Locks and the Sault Ste. Marie Canal.

The Soo Locks (sometimes spelled Sault Locks but pronounced "soo") are a set of parallel locks, operated and maintained by the United States Army Corps of Engineers, Detroit District, that enable ships to travel between Lake Superior and the lower Great Lakes. They are located on the St. Marys River between Lake Superior and Lake Huron, between the Upper Peninsula of the U.S. state of Michigan and the Canadian province of Ontario. They bypass the rapids of the river, where the water falls 21 ft (6.4 m). The locks pass an average of 10,000 ships per year, despite being closed during the winter from January through March, when ice shuts down shipping on the Great Lakes. The winter closure period is used to inspect and maintain the locks.

The locks share a name (usually shortened and anglicized as Soo) with the two cities named Sault Ste. Marie, in Ontario and in Michigan, located on either side of the St. Marys River. The Sault Ste. Marie International Bridge between the United States and Canada permits vehicular traffic to pass over the locks. A railroad bridge crosses the St. Marys River just upstream of the highway bridge.

Interstate 75 (I-75) is a major north–south Interstate Highway in the Great Lakes and Southeastern regions of the United States. As with most Interstates that end in 5, it is a major cross-country, north–south route at a length of 1,786.47 miles (2,875.04 km), traveling from State Road 826 (SR 826, Palmetto Expressway) and SR 924 (Gratigny Parkway) on the Hialeah–Miami Lakes border (a few miles northwest of Miami, Florida), to Sault Ste. Marie, Michigan, at the Canada–United States border. It is the second-longest north–south Interstate Highway (after I-95) and the seventh-longest Interstate Highway overall.

I-75 passes through six different states. The highway runs the length of the Florida peninsula from the Miami area and up the Gulf Coast through Tampa. Farther north in Georgia, I-75 continues on through Macon and Atlanta before running through Chattanooga and Knoxville and the Cumberland Mountains in Tennessee. I-75 crosses Kentucky, passing through Lexington before crossing the Ohio River into Cincinnati, Ohio. In Ohio, the highway runs up the western side through Dayton and Lima before crossing into Michigan north of Toledo. I-75 runs northeasterly along the Lake Erie shoreline and Detroit River into the city of Detroit before turning northwesterly to Flint and northward to the Mackinac Bridge where the freeway crosses the strait between Lakes Huron and Michigan. Farther north, I-75 approaches the Canadian border at Sault Ste. Marie, downriver from Lake Superior, 1,786.5 miles (2,875.1 km) from its origins near the subtropical Atlantic Ocean.

Interstate 75 (I-75) is a part of the Interstate Highway System that runs 1,786.47 miles (2,875.04 km) from Miami Lakes, Florida to the Canada–United States border at Sault Ste. Marie, Michigan. In the U.S. state of Kentucky, I-75 runs through the eastern half of the state, from the Tennessee state line near the city of Williamsburg to the Ohio state line near Covington. The Interstate serves the state's second-most populous city, Lexington. Outside of it, the route is mostly rural or suburban in nature, mainly providing access to other cities via state and U.S. Highways. The major landscapes traversed by I-75 include the rolling hills and mountains of the Cumberland Plateau, the flat Bluegrass region, the urban core of Lexington, and the highly urbanized suburbs of Northern Kentucky; it also very briefly crosses through the Eastern Kentucky Coalfield at its southernmost stretch and passes near the Daniel Boone National Forest in London.

Of the six states which I-75 passes through, the segment in Kentucky is the second-shortest, at 191.78 miles (308.64 km) long. I-75 parallels the older U.S. Route 25 (US 25) and U.S. Route 25E (US 25E) corridors for its entire length in Kentucky. The Interstate was part of the Federal-Aid Highway Act of 1956, with a section of it from the Ohio River at Covington to an unknown location north of Richmond being the first segment of the Interstate Highway, opened in 1957. Unfinished portions of the highway were eventually completed in increments, with the very last section being opened in 1969. Due to the rapid growth and high traffic volume in the Lexington metropolitan area and Northern Kentucky, many widening projects and renovations have been undertaken on I-75 since then. The Interstate has one auxiliary route, I-275, a beltway encircling Cincinnati.

A concretion is a hard and compact mass formed by the precipitation of mineral cement within the spaces between particles, and is found in sedimentary rock or soil. Concretions are often ovoid or spherical in shape, although irregular shapes also occur. The word concretion is borrowed from Latin concretio '(act of) compacting, condensing, congealing, uniting', itself derived from concrescere 'to thicken, condense, congeal', from con- 'together' and crescere 'to grow'.

Concretions form within layers of sedimentary strata that have already been deposited. They usually form early in the burial history of the sediment, before the rest of the sediment is hardened into rock. This concretionary cement often makes the concretion harder and more resistant to weathering than the host stratum.

Sault Ste. Marie (/ˌsuː seɪnt məˈriː/ SOO saynt mə-REE) is a city in northern Ontario, Canada, on the north shore of the St. Mary's River directly across from its "twin city", Sault Ste. Marie, in the state of Michigan. The city's population was 72,051 at the 2021 census, making it the third most populous city in northern Ontario.

The city is a hub for manufacturing (primarily of steel), tourism, and health and social services.