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Split Rock Lighthouse
Split Rock Lighthouse is a lighthouse located southwest of Silver Bay, Minnesota, USA on the North Shore (Lake Superior), North Shore of Lake Superior. The structure was designed by lighthouse engineer Ralph Russell Tinkham and was completed in 1910 by the United States Lighthouse Service at a cost of $75,000, including the buildings and the land. It is considered one of the most picturesque lighthouses in the United States. History Split Rock Lighthouse was built in response to the great loss of ships during the famous Mataafa Storm of 1905, during which 29 ships were lost or damaged on Lake Superior. One of these shipwrecks, the ''Madeira (shipwreck), Madeira'', is located just north of the lighthouse. The lighthouse stands on a sheer cliff eroded by wave action from a diabase sill (geology), sill containing inclusion (mineral), inclusions of anorthosite. The octagonal building is a steel-framed brick structure with concrete trim on a concrete foundation set into the rock of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Split Rock Lighthouse State Park
Split Rock Lighthouse State Park is a state park of Minnesota on the North Shore of Lake Superior. It is best known for the picturesque Split Rock Lighthouse, one of the most photographed lighthouses in the United States. Built by the United States Lighthouse Service in 1910, the lighthouse and some adjacent buildings have been restored and the Minnesota Historical Society operates them as a museum. The state park offers a unique cart-in campground and scenic trails for hiking, cross-country skiing, and bicycling. Natural history Geography Split Rock Lighthouse State Park encompasses about of rocky shoreline on Lake Superior with several prominent headlands. Named features of the shore, from southwest to northeast, are the mouth of the Split Rock River, Split Rock Point, Crazy Bay, Corundum Point, the mouth of Split Rock Creek, Day Hill, Little Two Harbors, Stony Point (site of the lighthouse), and Gold Rock Point.State of Minnesota, Department of Natural Resources. ''Sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anorthosite
Anorthosite () is a phaneritic, intrusive igneous rock characterized by its composition: mostly plagioclase feldspar (90–100%), with a minimal mafic component (0–10%). Pyroxene, ilmenite, magnetite, and olivine are the mafic minerals most commonly present. Anorthosites are of enormous geologic interest, because it is still not fully understood how they form. Most models involve separating plagioclase crystals based on their density. Plagioclase crystals are usually less dense than magma; so, as plagioclase crystallizes in a magma chamber, the plagioclase crystals float to the top, concentrating there. Anorthosite on Earth can be divided into five types: # Archean-age anorthosites # Proterozoic anorthosite (also known as massif or massif-type anorthosite) – the most abundant type of anorthosite on Earth # Layers within Layered Intrusions (e.g., Bushveld and Stillwater intrusions) # Mid-ocean ridge and transform fault anorthosites # Anorthosite xenoliths in other rocks ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Howard Koslow
Howard Koslow (September 21, 1924 – January 25, 2016) was an American illustrator. Koslow was awarded an Art League scholarship to Pratt Institute in New York City. He graduated in 1944 and went on to apprentice with French poster artist Jean Carlu at the latter's New York City studio. Koslow went on to study painting at the Cranbrook Academy of Art in Bloomfield Hills, Michigan, and graphics at the School of Visual Arts. Some of Koslow's works are at the United States Air Force Academy and The Pentagon. Several of his paintings which were commissioned by NASA are on exhibition at the National Air and Space Museum, Washington, D.C., and the NASA Art Gallery, Kennedy Space Center. He is responsible for the design of the Antarctic Treaty issue The Antarctic Treaty issue is a postage stamp that was issued by the United States Post Office Department on June 23, 1971. Designed by Howard Koslow, it commemorates the ten-year anniversary of the Antarctic Treaty, and is notable as Ko ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Postal Service
The United States Postal Service (USPS), also known as the Post Office, U.S. Mail, or Postal Service, is an independent agency of the executive branch of the United States federal government responsible for providing postal service in the U.S., including its insular areas and associated states. It is one of the few government agencies explicitly authorized by the U.S. Constitution. The USPS, as of 2021, has 516,636 career employees and 136,531 non-career employees. The USPS traces its roots to 1775 during the Second Continental Congress, when Benjamin Franklin was appointed the first postmaster general; he also served a similar position for the colonies of the Kingdom of Great Britain. The Post Office Department was created in 1792 with the passage of the Postal Service Act. It was elevated to a cabinet-level department in 1872, and was transformed by the Postal Reorganization Act of 1970 into the U.S. Postal Service as an independent agency. Since the early 1980s, m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Historic Landmark
A National Historic Landmark (NHL) is a building, district, object, site, or structure that is officially recognized by the United States government for its outstanding historical significance. Only some 2,500 (~3%) of over 90,000 places listed on the country's National Register of Historic Places are recognized as National Historic Landmarks. A National Historic Landmark District may include contributing properties that are buildings, structures, sites or objects, and it may include non-contributing properties. Contributing properties may or may not also be separately listed. Creation of the program Prior to 1935, efforts to preserve cultural heritage of national importance were made by piecemeal efforts of the United States Congress. In 1935, Congress passed the Historic Sites Act, which authorized the Interior Secretary authority to formally record and organize historic properties, and to designate properties as having "national historical significance", and gave the Nation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SS Edmund Fitzgerald
SS ''Edmund Fitzgerald'' was an American Great Lakes freighter that sank in Lake Superior during a storm on November 10, 1975, with the loss of the entire crew of 29 men. When launched on June 7, 1958, she was the largest ship on North America's Great Lakes, and she remains the largest to have sunk there. She was located in deep water on November 14, 1975, by a U.S. Navy aircraft detecting magnetic anomalies, and found soon afterwards to be in two large pieces. For 17 years, ''Edmund Fitzgerald'' carried taconite iron ore from mines near Duluth, Minnesota, to iron works in Detroit, Michigan; Toledo, Ohio; and other Great Lakes ports. As a workhorse, she set seasonal haul records six times, often breaking her own record. Captain Peter Pulcer was known for piping music day or night over the ship's intercom while passing through the St. Clair and Detroit rivers (between lakes Huron and Erie), and entertaining spectators at the Soo Locks (between Lakes Superior and Huron) w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Register Of Historic Places
The National Register of Historic Places (NRHP) is the United States federal government's official list of districts, sites, buildings, structures and objects deemed worthy of preservation for their historical significance or "great artistic value". A property listed in the National Register, or located within a National Register Historic District, may qualify for tax incentives derived from the total value of expenses incurred in preserving the property. The passage of the National Historic Preservation Act (NHPA) in 1966 established the National Register and the process for adding properties to it. Of the more than one and a half million properties on the National Register, 95,000 are listed individually. The remainder are contributing resources within historic districts. For most of its history, the National Register has been administered by the National Park Service (NPS), an agency within the U.S. Department of the Interior. Its goals are to help property owners and inte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minnesota Historical Society
The Minnesota Historical Society (MNHS) is a nonprofit educational and cultural institution dedicated to preserving the history of the U.S. state of Minnesota. It was founded by the territorial legislature in 1849, almost a decade before statehood. The Society is named in the Minnesota Constitution. It is headquartered in the Minnesota History Center in downtown Saint Paul. Although its focus is on Minnesota history it is not constrained by it. Its work on the North American fur trade has been recognized in Canada as well. MNHS holds a collection of nearly 550,000 books, 37,000 maps, 250,000 photographs, 225,000 historical artifacts, 950,000 archaeological items, of manuscripts, of government records, 5,500 paintings, prints and drawings; and 1,300 moving image items. ''MNopedia: The Minnesota Encyclopedia'', is since 2011 an online "resource for reliable information about significant people, places, events, and things in Minnesota history", that is funded through a Legacy A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Coast Guard
The United States Coast Guard (USCG) is the maritime security, search and rescue, and law enforcement service branch of the United States Armed Forces and one of the country's eight uniformed services. The service is a maritime, military, multi-mission service unique among the United States military branches for having a maritime law enforcement mission with jurisdiction in both domestic and international waters and a federal regulatory agency mission as part of its duties. It is the largest and most powerful coast guard in the world, rivaling the capabilities and size of most navies. The U.S. Coast Guard is a humanitarian and security service. It protects the United States' borders and economic and security interests abroad; and defends its sovereignty by safeguarding sea lines of communication and commerce across vast territorial waters spanning 95,000 miles of coastline and its Exclusive Economic Zone. With national and economic security depending upon open global trade a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diaphone
The diaphone is a noisemaking device best known for its use as a foghorn: It can produce deep, powerful tones, able to carry a long distance. Although they have fallen out of favor, diaphones were also used at some fire stations and in other situations where a loud, audible signal was required. History The diaphone horn was based directly on the organ stop of the same name invented by Robert Hope-Jones, creator of the Wurlitzer organ. Hope-Jones' design was based on a piston that was closed only at its bottom end and had slots, perpendicular to its axis, cut through its sides; the slotted piston moved within a similarly slotted cylinder. Outside of the cylinder was a reservoir of high-pressure air. Initially, high-pressure air would be admitted behind the piston, pushing it forward. When the slots of the piston aligned with those of the cylinder, air passed into the piston, making a sound and pushing the piston back to its starting position, whence the cycle would repeat. A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fog Signal
A foghorn or fog signal is a device that uses sound to warn vehicles of navigational hazards such as rocky coastlines, or boats of the presence of other vessels, in foggy conditions. The term is most often used in relation to marine transport. When visual navigation aids such as lighthouses are obscured, foghorns provide an audible warning of rock outcrops, shoals, headlands, or other dangers to shipping. Description All foghorns use a vibrating column of air to create an audible tone, but the method of setting up this vibration differs. Some horns, such as the Daboll trumpet, used vibrating plates or metal reeds, a similar principle to a modern electric car horn. Others used air forced through holes in a rotating cylinder or disk, in the same manner as a siren. Semi-automatic operation of foghorns was achieved by using a clockwork mechanism (or "coder") to sequentially open the valves admitting air to the horns; each horn was given its own timing characteristics to help mari ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minnesota State Highway 61
Minnesota State Highway 61 (MN 61) is a highway in northeast Minnesota, which runs from a junction with Interstate 35 (I-35) in Duluth at 26th Avenue East, and continues northeast to its northern terminus at the Canadian border near Grand Portage, connecting to Ontario Highway 61 at the Pigeon River Bridge. The route is a scenic highway, following the North Shore of Lake Superior, and is part of the Lake Superior Circle Tour designation that runs through Minnesota, Ontario, Michigan, and Wisconsin. This roadway was designated U.S. Highway 61 (US 61) until 1991. US 61 ran from the Canadian border to New Orleans, and is the road to which musician and Duluth native Bob Dylan referred in the album and song ''Highway 61 Revisited''. The North Shore Scenic Drive is an All-American Road scenic byway that follows Saint Louis County Road 61 / Lake County Road 61 / MN 61, formerly US 61, from the city of Duluth, Minnesota, to the Canadian border near Grand Portage. The route st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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