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Straits Of Mackinac Shipwreck Preserve
The Straits of Mackinac Shipwreck Preserve is a state preserve in and around the Straits of Mackinac. The preserve is divided in two by the Mackinac Bridge. The waters of the preserve include the waters offshore from Mackinaw City and St. Ignace, as well as all or part of the shorelines of Bois Blanc Island, Mackinac Island, Round Island, and St. Helena Island. The preserve contains at least eleven identified wrecks. Frequent fog and congested shipping added to the count of shipwrecks in the Straits area. Half a dozen lighthouses in and around the preserve testify to the dangers that existed prior to the invention of radar in the 1940s. However, tragedies have continued. One modern wreck within the boundaries of the preserve is , a lake freighter transporting limestone that sank in 1965 after a collision. Divers also visit underwater formations of Mackinac breccia near Mackinac Island; one such formation, the "Rock Maze", is offshore from Arch Rock. Further east off Arch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Huron
Lake Huron ( ) is one of the five Great Lakes of North America. Hydrology, Hydrologically, it comprises the easterly portion of Lake Michigan–Huron, having the same surface elevation as Lake Michigan, to which it is connected by the , Straits of Mackinac. It is shared on the north and east by the Canadian province of Ontario and on the south and west by the U.S. state of Michigan. The name of the lake is derived from early French explorers who named it for the Wyandot people, Huron people inhabiting the region. The Huronian glaciation was named from evidence collected from Lake Huron region. The northern parts of the lake include the North Channel (Ontario), North Channel and Georgian Bay. Saginaw Bay is located in the southwest corner of the lake. The main inlet is the St. Marys River (Michigan–Ontario), St. Marys River, and the main outlet is the St. Clair River. Geography By surface area, Lake Huron is the second-largest of the Great Lakes, with a surface area of — ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lighthouse
A lighthouse is a tower, building, or other type of physical structure designed to emit light from a system of lamps and lenses and to serve as a beacon for navigational aid, for maritime pilots at sea or on inland waterways. Lighthouses mark dangerous coastlines, hazardous shoals, reefs, rocks, and safe entries to harbors; they also assist in aerial navigation. Once widely used, the number of operational lighthouses has declined due to the expense of maintenance and has become uneconomical since the advent of much cheaper, more sophisticated and effective electronic navigational systems. History Ancient lighthouses Before the development of clearly defined ports, mariners were guided by fires built on hilltops. Since elevating the fire would improve the visibility, placing the fire on a platform became a practice that led to the development of the lighthouse. In antiquity, the lighthouse functioned more as an entrance marker to ports than as a warning signal for reefs a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protected Areas Of Mackinac County, Michigan
Protection is any measure taken to guard a thing against damage caused by outside forces. Protection can be provided to physical objects, including organisms, to systems, and to intangible things like civil and political rights. Although the mechanisms for providing protection vary widely, the basic meaning of the term remains the same. This is illustrated by an explanation found in a manual on electrical wiring: Some kind of protection is a characteristic of all life, as living things have evolved at least some protective mechanisms to counter damaging environmental phenomena, such as ultraviolet light. Biological membranes such as bark on trees and skin on animals offer protection from various threats, with skin playing a key role in protecting organisms against pathogens and excessive water loss. Additional structures like scales and hair offer further protection from the elements and from predators, with some animals having features such as spines or camouflage servi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protected Areas Of Emmet County, Michigan
Protection is any measure taken to guard a thing against damage caused by outside forces. Protection can be provided to physical objects, including organisms, to systems, and to intangible things like civil and political rights. Although the mechanisms for providing protection vary widely, the basic meaning of the term remains the same. This is illustrated by an explanation found in a manual on electrical wiring: Some kind of protection is a characteristic of all life, as living things have evolved at least some protective mechanisms to counter damaging environmental phenomena, such as ultraviolet light. Biological membranes such as bark on trees and skin on animals offer protection from various threats, with skin playing a key role in protecting organisms against pathogens and excessive water loss. Additional structures like scales and hair offer further protection from the elements and from predators, with some animals having features such as spines or camouflage serving ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protected Areas Of Cheboygan County, Michigan
Protection is any measure taken to guard a thing against damage caused by outside forces. Protection can be provided to physical objects, including organisms, to systems, and to intangible things like civil and political rights. Although the mechanisms for providing protection vary widely, the basic meaning of the term remains the same. This is illustrated by an explanation found in a manual on electrical wiring: Some kind of protection is a characteristic of all life, as living things have evolved at least some protective mechanisms to counter damaging environmental phenomena, such as ultraviolet light. Biological membranes such as bark on trees and skin on animals offer protection from various threats, with skin playing a key role in protecting organisms against pathogens and excessive water loss. Additional structures like scales and hair offer further protection from the elements and from predators, with some animals having features such as spines or camouflage serving ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Round Island Light (Michigan)
For the lighthouse of the same name in the St. Mary's River, see Round Island Light (St. Mary's River) The Round Island Light, also known as the "Old Round Island Point Lighthouse" is a lighthouse located on the west shore of Round Island in the shipping lanes of the Straits of Mackinac, which connect Lake Michigan and Lake Huron. It was deemed necessary because the island is a significant hazard to navigation in the straits, and was seen as an effective complement to the other lights in the area. Because of its color scheme and form — red stone base and wood tower — it has been likened to an old-fashioned schoolhouse. Ferries regularly pass it on their way to (and from) Mackinac Island, and it is a recognizable icon of the upper Great Lakes. History This light is a twin of the Two Harbors Light in Minnesota. Located in Coast Guard District 9, the Round Island Light was built of painted brick in 1895 by a predecessor agency of the United States Coast Guard and Mackinac islan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Old Mackinac Point Light
Old Mackinac Point Light is a deactivated lighthouse located at the northern tip of the Lower Peninsula in the U.S. state of Michigan. The lighthouse is part of Fort Michilimackinac State Park in the village of Mackinaw City just east of the Mackinac Bridge. The lighthouse was constructed in 1892 along the Straits of Mackinac at the junction of Lake Michigan and Lake Huron. It was deactivated in 1957 and currently serves as a museum. History Preparations Even before the advent of European explorers, the Straits of Mackinac were a significant hazard to water borne travelers. Consequently, before lighthouses, the Ojibwa lit the shore with fires. In the early 19th century, with large vessel traffic increasing from Lake Huron into the Straits, the first step in guarding the Straits was taken in 1829, through the construction of Bois Blanc Lighthouse to both guide mariners in making the westerly turn into the Straits, and to warn them of the shoals and shallows surrounding t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SS Cayuga
SS ''Cayuga'' was a steel-hulled American package freighter in service between 1889 and 1895. She was built in 1889 in Cleveland, Ohio, by the Globe Iron Works Company for the Lehigh Valley Transit Company of Buffalo, New York. One of five identical sister ships, ''Cayuga'' entered service in 1889, carrying package freight between Buffalo and Chicago, Illinois, also making stops in Milwaukee, Wisconsin, and Gladstone, Michigan. Prior to her sinking, ''Cayuga'' was involved in two accidents. In the first in 1890, when she went aground in a gale just outside of Buffalo harbour; six tugboats managed to pull her free that same day. The second accident occurred in 1891, when ''Cayuga'' was involved in a collision with the package freighter ''Delaware'' near Cheboygan, Michigan. On the morning of May 10, 1895, ''Cayuga'' while bound for Buffalo with a cargo of oats, flour and general merchandise. A thick fog hung over Lake Michigan. As ''Cayuga'' neared Ile Aux Galets, her crew ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arch Rock (Mackinac Island)
Arch Rock is a geologic formation on Mackinac Island in Michigan. It is a natural limestone arch formed during the Nipissing post-glacial period, a period of high Lake Huron levels following the end of the Wisconsin glaciation. To this day Arch Rock stands on the Lake Huron shoreline above the water. Limestone breccia is not an ideal material for natural bridges, and this type of formation is quite rare in the North American Great Lakes region. The Native Americans saw Arch Rock as a place of numinous power, and told many stories and legends about it. Euro-Americans did not share many of the taboos of their Native predecessors, and treated Arch Rock as a curiosity to be admired. One early chronicler was Alexis de Tocqueville who wrote of the "Giant's Arch" "of extraordinary shape" during his visit in August, 1831. Its presence was a major element in the decisions to create Mackinac National Park in 1875 and its successor, Mackinac Island State Park Mackinac Island Sta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Breccia
Breccia () is a rock composed of large angular broken fragments of minerals or rocks cemented together by a fine-grained matrix. The word has its origins in the Italian language, in which it means "rubble". A breccia may have a variety of different origins, as indicated by the named types including sedimentary breccia, tectonic breccia, igneous breccia, impact breccia, and hydrothermal breccia. A megabreccia is a breccia composed of very large rock fragments, sometimes kilometers across, which can be formed by landslides, impact events, or caldera collapse. Types Breccia is composed of coarse rock fragments held together by cement or a fine-grained matrix. Like conglomerate, breccia contains at least 30 percent of gravel-sized particles (particles over 2mm in size), but it is distinguished from conglomerate because the rock fragments have sharp edges that have not been worn down. These indicate that the gravel was deposited very close to its source area, since otherwise th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limestone
Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms when these minerals precipitate out of water containing dissolved calcium. This can take place through both biological and nonbiological processes, though biological processes, such as the accumulation of corals and shells in the sea, have likely been more important for the last 540 million years. Limestone often contains fossils which provide scientists with information on ancient environments and on the evolution of life. About 20% to 25% of sedimentary rock is carbonate rock, and most of this is limestone. The remaining carbonate rock is mostly dolomite, a closely related rock, which contains a high percentage of the mineral dolomite, . ''Magnesian limestone'' is an obsolete and poorly-defined term used variously for dolomite, for limes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Freighter
Lake freighters, or lakers, are bulk carrier vessels that operate on the Great Lakes of North America. These vessels are traditionally called boats, although classified as ships. Since the late 19th century, lakers have carried bulk cargoes of materials such as limestone, iron ore, grain, coal, or salt from the mines and fields of the upper Great Lakes to the populous industrial areas farther east. The 63 commercial ports handled 173 million tons of cargo in 2006. Because of winter ice on the lakes, the navigation season is not usually year-round. The Soo Locks and Welland Canal close from mid-January to late March, when most boats are laid up for maintenance. Crew members spend these months ashore. Depending on their application, lakers may also be referred to by their types, such as ''oreboats'' or ''ironboats'' (primarily for iron ore), ''straight deckers'' (no self-unloading gear), ''bulkers'' (carry bulk cargo), ''sternenders'' (all cabins aft), ''self unloaders'' (with sel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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