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Concord River
The Concord River is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map, accessed October 3, 2011 tributary of the Merrimack River in eastern Massachusetts in the United States. The river drains a small rural and suburban region northwest of Boston. One of the most famous small rivers in U.S. history, it was the scene of an important early battle of the American Revolutionary War and was the subject of a famous 19th-century book by Henry David Thoreau. Description and early history The river begins in Middlesex County, formed by the confluence of the Sudbury and Assabet rivers at Egg Rock, near the Concord town center. It flows generally north, from eastern Concord (along the northwestern edge of the Boston metropolitan area), joining the Merrimack River from the south on the eastern side of Lowell. It is a gently flowing stream with little variation in topography along most of its route. Its drainage basin stretches into Wo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Old North Bridge
Old or OLD may refer to: Places *Old, Baranya, Hungary *Old, Northamptonshire, England *Old Street station, a railway and tube station in London (station code OLD) *OLD, IATA code for Old Town Municipal Airport and Seaplane Base, Old Town, Maine, United States People *Old (surname) Music *OLD (band), a grindcore/industrial metal group * ''Old'' (Danny Brown album), a 2013 album by Danny Brown * ''Old'' (Starflyer 59 album), a 2003 album by Starflyer 59 * "Old" (song), a 1995 song by Machine Head *''Old LP'', a 2019 album by That Dog Other uses * ''Old'' (film), a 2021 American thriller film *''Oxford Latin Dictionary'' *Online dating *Over-Locknut Distance (or Dimension), a measurement of a bicycle wheel and frame *Old age See also *List of people known as the Old * * *Olde, a list of people with the surname *Olds (other) Olds may refer to: People * The olds, a jocular and irreverent online nickname for older adults * Bert Olds (1891–1953), Australian rules ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Worcester County, Massachusetts
Worcester County is a County (United States), county located in the U.S. state of Massachusetts. At the 2020 United States census, 2020 census, the population was 862,111, making it the second-most populous county in Massachusetts while also being the largest in area. The largest city and traditional county seat, shire town is the Worcester, Massachusetts, city of Worcester. Worcester County is included in the Worcester, MA-Connecticut, CT Metropolitan Statistical Area as well as the Boston-Worcester-Providence, Rhode Island, Providence, MA-Rhode Island, RI-New Hampshire, NH-CT Greater Boston, Combined Statistical Area. History Worcester County was formed from the eastern portion of colonial Hampshire County, Massachusetts, Hampshire County, the western portion of the original Middlesex County, Massachusetts, Middlesex County and the extreme western portion of the original Suffolk County, Massachusetts, Suffolk County. When the government of Worcester County was established on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whitewater
Whitewater forms in a rapid context, in particular, when a river's gradient changes enough to generate so much turbulence that air is trapped within the water. This forms an unstable current that froths, making the water appear opaque and white. The term "whitewater" also has a broader meaning, applying to any river or creek that has a significant number of rapids. The term is also used as an adjective describing boating on such rivers, such as whitewater canoeing or whitewater kayaking. Fast rivers Four factors, separately or in combination, can create rapids: gradient, constriction, obstruction, and flow rate. Gradient, constriction, and obstruction are streambed topography factors and are relatively consistent. Flow rate is dependent upon both seasonal variation in precipitation and snowmelt and upon release rates of upstream dams. Streambed topography Streambed topography is the primary factor in creating rapids, and is generally consistent over time. Increased f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Suburbanization
Suburbanization is a population shift from central urban areas into suburbs, resulting in the formation of (sub)urban sprawl. As a consequence of the movement of households and businesses out of the city centers, low-density, peripheral urban areas grow. Sub-urbanization is inversely related to urbanization, which denotes a population shift from rural areas into urban centers. Many residents of metropolitan regions work within the central urban area, but live outside of it, in satellite communities called suburbs, and commute to work by car or mass transit. Others have the opportunity to work from home, due to technological advances. Suburbanization often occurs in more economically developed countries. The United States is believed to be the first country in which the majority of the population lived in suburbs rather than cities or rural areas. Proponents of containing the urban sprawl argue that the sprawl leads to urban decay and a concentration of lower-income residents ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Walden Pond
Walden Pond is a pond in Concord, Massachusetts, in the United States. A famous example of a kettle hole, it was formed by retreating glaciers 10,000–12,000 years ago. The pond is protected as part of Walden Pond State Reservation, a state park and recreation site managed by the Massachusetts Department of Conservation and Recreation. The reservation was designated a National Historic Landmark in 1962 for its association with the writer Henry David Thoreau (1817–1862), whose two years living in a cabin on its shore provided the foundation for his famous 1854 work, '' Walden; or, Life in the Woods''. The National Historic Preservation Act of 1966 ensured federal support for the preservation of the pond.http://npshistory.com/publications/national-historic-preservation-act.pdf Description The Walden Pond Reservation is located south of Massachusetts Route 2 and (mostly) west of Massachusetts Route 126 in Concord and Lincoln, Massachusetts. The Fitchburg Line of the MBTA Commu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
A Week On The Concord And Merrimack Rivers
''A Week on the Concord and Merrimack Rivers'' (1849) is a book by American writer Henry David Thoreau (1817–1862). It recounts his experience on a boat trip with his brother on the Concord River and Merrimack River. Overview ''A Week on the Concord and Merrimack Rivers'' is ostensibly the narrative of a boat trip from Concord, Massachusetts to Concord, New Hampshire, and back, that Thoreau took with his brother John in 1839. John died of tetanus in 1842 and Thoreau wrote the book, in part, as a tribute to his memory. While the book may appear to be a travel journal, broken up into chapters for each day, this is deceptive. The actual trip took two weeks and while given passages are a literal description of the journey — down the Concord River to the Middlesex Canal, to the Merrimack River, and back — much of the text is in the form of digressions by the Harvard University, Harvard-educated author on diverse topics such as religion, poetry, and history. Thoreau relates these ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Park Service
The National Park Service (NPS) is an agency of the United States federal government within the U.S. Department of the Interior that manages all national parks, most national monuments, and other natural, historical, and recreational properties with various title designations. The U.S. Congress created the agency on August 25, 1916, through the National Park Service Organic Act. It is headquartered in Washington, D.C., within the main headquarters of the Department of the Interior. The NPS employs approximately 20,000 people in 423 individual units covering over 85 million acres in all 50 states, the District of Columbia, and US territories. As of 2019, they had more than 279,000 volunteers. The agency is charged with a dual role of preserving the ecological and historical integrity of the places entrusted to its management while also making them available and accessible for public use and enjoyment. History Yellowstone National Park was created as the first national par ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lexington, Massachusetts
Lexington is a suburban town in Middlesex County, Massachusetts, United States. It is 10 miles (16 km) from Downtown Boston. The population was 34,454 as of the 2020 census. The area was originally inhabited by Native Americans, and was first settled by Europeans in 1641 as a farming community. Lexington is well known as the site of the first shots of the American Revolutionary War, in the Battle of Lexington on April 19, 1775, where the " Shot heard 'round the world" took place. It is home to Minute Man National Historical Park. History Indigenous history Native Americans inhabited the area that would become Lexington for thousands of years prior to European colonization of the Americas, as attested by a woodland era archaeological site near Loring Hill south of the town center. At the time of European contact, the area may have been a border region between Naumkeag or Pawtucket to the northeast, Massachusett to the south, and Nipmuc to the west, though the land was ev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Eel
The American eel (''Anguilla rostrata'') is a facultative catadromous fish found on the eastern coast of North America. Freshwater eels are fish belonging to the elopomorph superorder, a group of phylogenetically ancient teleosts. The American eel has a slender, snake-like body that is covered with a mucus layer, which makes the eel appear to be naked and slimy despite the presence of minute scales. A long dorsal fin runs from the middle of the back and is continuous with a similar ventral fin. Pelvic fins are absent, and relatively small pectoral fins can be found near the midline, followed by the head and gill covers. Variations exist in coloration, from olive green, brown shading to greenish-yellow and light gray or white on the belly. Eels from clear water are often lighter than those from dark, tannic acid streams. The eel lives in fresh water and estuaries and only leaves these habitats to enter the Atlantic Ocean to make its spawning migration to the Sargasso Sea. Spa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carp
Carp are various species of oily freshwater fish from the family Cyprinidae, a very large group of fish native to Europe and Asia. While carp is consumed in many parts of the world, they are generally considered an invasive species in parts of Africa, Australia and most of the United States. Biology The cypriniformes (family Cyprinidae) are traditionally grouped with the Characiformes, Siluriformes, and Gymnotiformes to create the superorder Ostariophysi, since these groups share some common features. These features include being found predominantly in fresh water and possessing Weberian ossicles, an anatomical structure derived from the first five anterior-most vertebrae, and their corresponding ribs and neural crests. The third anterior-most pair of ribs is in contact with the extension of the labyrinth and the posterior with the swim bladder. The function is poorly understood, but this structure is presumed to take part in the transmission of vibrations from the swim bl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chain Pickerel
The chain pickerel (''Esox niger'') is a species of freshwater fish in the pike family (family Esocidae) of order Esociformes. The chain pickerel and the American pickerel (''E. americanus'') belong to the ''Esox'' genus of pike. Taxonomy French naturalist Charles Alexandre Lesueur described the chain pickerel in 1818. Its species name is the Latin word ''niger'' "black". Nicknames in the southeastern United States are the "southern pike", "grass pike", "jack", "jack fish", and "eastern pickerel". Description The chain pickerel has a distinctive, dark, chain-like pattern on its greenish sides. There is a vertical dark marking underneath the eye, which helps to distinguish the chain pickerel from redfin pickerel (''Esox americanus americanus'') and grass pickerel (''E. americanus vermiculatus''), in which the mark curves posteriorly. Its body outline resembles that of the northern pike (''E. lucius''). Unlike northern pike, however, the opercles and cheeks of chain pickerel are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alewife (fish)
The alewife (''Alosa pseudoharengus'') is an anadromous species of herring found in North America. It is one of the "typical" North American shads, attributed to the subgenus ''Pomolobus'' of the genus ''Alosa''. As an adult it is a marine species found in the northern West Atlantic Ocean, moving into estuaries before swimming upstream to breed in freshwater habitats, but some populations live entirely in fresh water. It is best known for its invasion of the Great Lakes by using the Welland Canal to bypass Niagara Falls. Here, its population surged, peaking between the 1950s and 1980s to the detriment of many native species of fish. In an effort to control them biologically, Pacific salmon were introduced, only partially successfully. As a marine fish, the alewife is a US National Marine Fisheries Service "Species of Concern". Description Alewife reach a maximum length of about 40 cm (16 in), but have an average length of about 25 cm (10 in). The front o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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