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Keweenaw Structure
The Keweenaw Peninsula (, ) is a peninsula of the U.S. state of Michigan. Part of the greater landmass of the Upper Peninsula, the Keweenaw Peninsula projects about northeasterly into Lake Superior, forming Keweenaw Bay. The peninsula is part of Michigan's Copper Country region, as the region was home to the first major copper mining boom in the United States. Copper mining was active in this region from the 1840s to the 1960s. The peninsula is bisected by the Keweenaw Waterway, a partly natural, partly artificial waterway serving as a canal. The north side of the canal is known locally as Copper Island. The cities of Houghton, the peninsula's largest population center, and Hancock, are located along the shores of the Keweenaw Waterway. Houghton is home to Michigan Technological University. The Keweenaw Peninsula is politically divided primarily between Houghton and Keweenaw counties, both of which occupy the Houghton micropolitan area. A small portion of the southeast o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brockway Mountain Lake Superior
Brockway may refer to: Places In the United States: * Brockway, California * Brockway, Montana * Brockway, Oregon * Brockway, Pennsylvania * Brockway, Wisconsin, a town ** Brockway (community), Wisconsin, an unincorporated community * Brockway Township, Michigan * Brockway Township, Minnesota People * Archibald Fenner Brockway, British anti-war activist and politician * Buzz Brockway, American politician * Benjamin Benson Brockway, Oregon pioneer * Derek Brockway, Welsh meteorologist and TV presenter * Hiel Brockway, Businessman * Lawrence O. Brockway, Physical chemist * Robin Brockway, British actor * Zebulon Brockway, penologist and prison reformer Other * Brockway Air, Vermont-based regional airline * Brockway Airport, New Brunswick, Canada * Brockway Motor Company Brockway Motor Company was a builder of custom heavy-duty trucks in Cortland, New York, from 1912 to 1977. History It was founded as Brockway Carriage Works in 1875 by William Brockway. His s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Keweenaw Fault
The Keweenaw Fault is a reverse fault that bisects the Keweenaw Peninsula of the Upper Peninsula of Michigan. The fault thrusts lava flows of the Midcontinent Rift System onto sedimentary rocks of the Jacobsville Sandstone. The fault is part of the inversion of the Midcontinent Rift where a region that had previously undergone extension experienced significant contraction. This contraction occurred during the final stages of the Grenvillian orogeny. The Keweenaw Peninsula, itself, is the southeastern side of a large syncline beneath Lake Superior. The northwestern side forms Isle Royale. The fault is more than long and extends from the tip of the Keweenaw Peninsula in the northeast to a termination near the Michigan-Wisconsin border in the southeast. The fault is most likely younger than the Jacobsville Formation and the Devonian The Devonian ( ) is a period (geology), geologic period and system (stratigraphy), system of the Paleozoic era (geology), era during the Phaner ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Trail
Water trails (also known as blueways) are marked routes on navigable waterway such as rivers, lakes, canals, and coastlines for recreational use. They allow access to waterways for non-motorized boats and sometimes motorized vessels, inner tubes, and other craft. Water trails not only require suitable access points and take-outs for exit but also provide places ashore to camp and picnic or other facilities for boaters. Water trails may be in public or private waters. In the United States, many water trails are assisted by the National Park Service. Local statutes may apply to landowners who steward water trails and the boaters who use them. Much of the Trans Canada Trail will be a network of water trails open to canoes and other small vessels. Recreational use of water trails is a form of ecotourism sometimes called "paddle tourism". Notable water trails and blueways include: * Allagash Wilderness Waterway * Captain John Smith Chesapeake National Historic Trail *Lake Mich ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Douglass Houghton
Douglass Houghton (September 21, 1809 – October 13, 1845) was an American geologist and physician, primarily known for his exploration of the Keweenaw Peninsula of Michigan. It was the site of a copper boom and extensive copper mining beginning in the 19th century. He was appointed in 1839 as the first state geologist of Michigan, after it was admitted to the union, and served in that position for the rest of his life. Early life and education Douglass Houghton was born in Troy, New York, the son of Jacob Houghton, a lawyer and later a county judge, and Mary Lydia (Douglass). Raised in a close-knit, cultured home in Fredonia, New York, Douglass was a small person with a nervous, active temperament inclined toward the practical and scientific. He exhibited early his lifelong interest in the natural world. In spite of a slight speech impediment and facial scarring from a youthful experiment with gunpowder, he was at ease with all levels of society. In 1829 Houghton entered the R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wayne State University Press
Wayne State University Press (or WSU Press) is a university press that is part of Wayne State University Wayne State University (WSU) is a public university, public research university in Detroit, Michigan, United States. Founded in 1868, Wayne State consists of 13 schools and colleges offering approximately 375 programs. It is Michigan's third-l .... It publishes under its own name and also the imprints Painted Turtle and Great Lakes Books Series. History The Press has strong subject areas in Africana studies; fairy-tale and folklore studies; film, television, and media studies; Jewish studies; regional interest; and speech and language pathology. Wayne State University Press also publishes eleven academic journals, including ''Marvels & Tales'', and several trade publications, as well as the ''Made in Michigan Writers Series''. WSU Press is located in the Leonard N. Simons Building on Wayne State University's main campus. An editorial board approves the Wayne State ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chlorastrolite
Chlorastrolite, also known as Isle Royale Greenstone, is a green or bluish green stone.Arguably the rarest gemstone in the world and one of the most valuable American gemstones. The gem quality specimens are typically found on Isle Royale, a large island off the Northeastern tip of Minnesota. Michigan's State Gemstone/ref> Chlorastrolite has finely radiating or stellate (for examples, see crystal habits) masses that have a "turtleback" pattern. The stellate masses tend to be chatoyant, meaning they have a varying luster. This chatoyancy can be subtranslucent to opaque. Cholorastrolite is a variety of pumpellyite: . Chlorastrolite was once thought to be an impure variety of prehnite or thomsonite. Occurrences Chlorastrolite occurs as amygdaloid structures and fracture fillings in basalt, and when the water and wave action has worn away the basalt, they are found as beach pebbles and granules in loose sediments. It is found in the Keweenaw Peninsula of the Upper Peninsula of Mi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alabama
Alabama ( ) is a U.S. state, state in the Southeastern United States, Southeastern and Deep South, Deep Southern regions of the United States. It borders Tennessee to the north, Georgia (U.S. state), Georgia to the east, Florida and the Gulf of Mexico to the south, and Mississippi to the west. Alabama is the List of U.S. states and territories by area, 30th largest by area, and the List of U.S. states and territories by population, 24th-most populous of the List of states and territories of the United States, 50 U.S. states. Alabama is nicknamed the ''Northern flicker, Yellowhammer State'', after the List of U.S. state birds, state bird. Alabama is also known as the "Heart of Dixie" and the "Cotton State". The state has diverse geography, with the north dominated by the mountainous Tennessee Valley and the south by Mobile Bay, a historically significant port. Alabama's capital is Montgomery, Alabama, Montgomery, and its largest city by population and area is Huntsville, Ala ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isle Royale
Isle Royale (, ) is an Islands of the Great Lakes, island of the Great Lakes located in the northwest of Lake Superior and part of the U.S. state of Michigan. The island and the 450 surrounding smaller islands and waters make up Isle Royale National Park. Isle Royale is long and wide, with an area of , making it the Lake island#Naturally occurring lake islands, by area, fourth-largest lake island in the world. In addition, it is the largest natural island in Lake Superior, the second-largest island in the Great Lakes (after Manitoulin Island), the third-largest in the contiguous United States (after Long Island and Padre Island), the largest in the contiguous US with no road link to the mainland, and the List of islands of the United States by area, 33rd-largest island in the United States. Isle Royale is defined by the United States Census Bureau as census tract, Census Tract 9603 of Keweenaw County, Michigan (a county found in the state's Upper Peninsula of Michigan, Upper ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Breccia
Breccia ( , ; ) is a rock composed of large angular broken fragments of minerals or Rock (geology), rocks cementation (geology), cemented together by a fine-grained matrix (geology), 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, fault (geology), fault or tectonics, tectonic breccia, igneous breccia, Impact event, impact breccia, and Hydrothermal circulation, 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 (geology), conglomerate, breccia contains at least 30 percent of gravel-sized particles (particles over 2mm in size), but it is distinguished from Conglomerate (geol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conglomerate (geology)
Conglomerate () is a sedimentary rock made up of rounded gravel-sized pieces of rock surrounded by finer-grained sediments (such as sand, silt, or clay). The larger fragments within conglomerate are called clasts, while the finer sediment surrounding the clasts is called the matrix. The clasts and matrix are typically cemented by calcium carbonate, iron oxide, silica, or hardened clay. Conglomerates form when rounded gravels deposited by water or glaciers become solidified and cemented by pressure over time. They can be found in sedimentary rock sequences of all ages but probably make up less than 1 percent by weight of all sedimentary rocks. They are closely related to sandstones in origin, and exhibit many of the same types of sedimentary structures, such as tabular and trough cross-bedding and graded bedding.Boggs, S. (2006) ''Principles of Sedimentology and Stratigraphy.'', 2nd ed. Prentice Hall, New York. 662 pp. Friedman, G.M. (2003) ''Classification of sediments and s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Native Copper
Native copper is an uncombined form of copper that occurs as a natural mineral. Copper is one of the few metallic elements to occur in native form, although it most commonly occurs in oxidized states and mixed with other elements. Native copper was an important ore used by pre-historic peoples. The name copper comes from the Greek ''kyprios'', "of Cyprus", the location of native copper mines since pre-historic times. Native copper typically occurs as irregular masses and fracture fillings, and rarely as isometric cubic and octahedral crystals. It has a reddish, orangish, and/or brownish color on fresh surfaces, but typically is weathered to a state of verdigris and coated with a green or blue-green tarnish or patina of copper(II) carbonate. Its specific gravity is 8.9 and Mohs hardness is 2.5–3. The mines of the Keweenaw native copper deposits of Upper Michigan were major copper producers in the 19th and early 20th centuries, and are the largest deposits of native co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
