Mackinac Island. Weathering Mackinac Island was formed as the glaciers of the last ice age began to melt around 13,000 BC. The bedrock strata that underlie.

Mackinac Island

Weathering

Mackinac Island was formed as the glaciers of the last ice age began to melt around 13,000 BC. The bedrock strata that underlie the island are much older, dating to Late Silurian and Early Devonian time, about 400 to 420 million years ago. Subsurface deposits of halite (rock salt) dissolved, allowing the collapse of overlying limestones; these once-broken but now solidified rocks comprise the Mackinac Breccia.

Weathering As the Great Lakes assumed their

present levels, Mackinac Island took on its current size.[4] The steep cliffs were one of the primary reasons for the British army's choice of the island for a fortification; their decision differed from that of the French army, which had built Fort Michilimackinac about 1715 near present-day Mackinaw City. The limestone formations are still part of the island's appeal. However, tourists are attracted by the natural beauty rather than the strategic value. One of the most popular geologic formations is Arch Rock, a natural limestone arch, 146 feet (45 m) above the ground.

Weathering

During an intermediate period of low water between these two high-water stages, the Straits of Mackinac shrank to a narrow gorge which discharged its water into Lake Huron through Mackinac Falls, located just east of Mackinac Island. At least three previous lake levels are known, two of them higher than the present shore: Algonquin level lakeshores date to about 13,000 years ago, and the Nipissing level shorelines formed 4,000 to 6,000 years ago. Other popular geologic formations include Devil's Kitchen, Skull Cave, and Sugar Loaf. The melting glaciers formed the Great Lakes, and the receding lakewaters eroded the limestone bedrock, forming the island's steep cliffs and rock formations.

Erosion With the onslaught of attention to

global climate change, it is becoming nearly impossible to go through a day without witnessing some sort of media coverage on the debate over our responsibility to be better stewards of our planet’s limited natural resources. Whether you agree or not with the urgency of actively managing our environment and it’s resources, it is a topic that is reaching fever pitch in public dialogue, media focus and government regulation. It is a movement that is undeniable not only in the United States but in countries across the globe and it shows no signs of slowing or reversing.

Erosion A Sobering Thought – Across the country,

deforestation, civil, commercial, residential development and construction, bridge and road building, road reconstruction, maintenance and use, as well as industry growth and use, cause massive amounts of water runoff and erosion. This runoff carries silt, chemicals, phosphates, nitrates, fertilizers and other impurities into our water sheds which in turn empty into our lakes, streams and rivers that eventually lead to our water supply. Water runoff and erosion upsets the delicate balance supporting the natural filtering of run off water. The impact on the environment has become so severe there is a distinct possibility that in some areas of the nation we are reaching a condition that is non-reversible.

Erosion

Industry – Over the past 7 years the growth of the erosion control industry has been unprecedented. It is becoming one of the fastest growing industries in the American economy today. Shore Sox having started research, development and testing 8 years ago in 2000, is strategically positioned to be a leader in the industry during it’s most aggressive period of growth. Working within government regulations and the permitting process, where installed, ShoreSox has already become an accepted solution the for natural erosion control. In fact as of the date of this writing, ShoreSox has never been refused a permit by local governing bodies.

Soil Lake waters eroded the

Limestone bedrock forming the islands steep cliffs and rock formations. The melting glaciers formed the Great Lakes, and the receding lakewaters eroded the limestone bedrock, forming the island's steep cliffs and rock formations. At least three previous lake levels are known, two of them higher than the present shore: Algonquin level lakeshores date to about 13,000 years ago, and the Nipissing level shorelines formed 4,000 to 6,000 years ago

Soil

During an intermediate period of low water between these two high-water stages, the Straits of Mackinac shrank to a narrow gorge which discharged its water into Lake Huron through Mackinac Falls, located just east of Mackinac Island. There was rock salt and it dissolved the limestone.

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