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Beaver Dam (Maryland)
Beaver Dam is a flooded marble quarry in Cockeysville, Maryland that has been used as a swimming location since the 1930s. Currently, a 30-acre swim club is located there with two swimming pools, a volleyball court, picnic tables and grills, a creek, and snack house. The 40 foot deep freshwater quarry has floating platforms, two rolling logs, diving and jumping platforms, and a rope swing. The quarry began operation in the 19th century and much of the labor was that of Irish immigrants using hand drills, hammers and chisels. In 1878, Hugh Sisson acquired the property and began using the latest equipment available: steam powered derricks, shovels, and diamond bit drills. Stone was loaded onto wagons and pulled by oxen to the nearby Northern Central Railway in Cockeysville until the quarry site itself was connected to the rail in 1866. The dolomitic marble, known to geologists as the Cockeysville Marble The Cockeysville Marble is a Precambrian, Cambrian, or Ordovician marble forma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Man Jumping At Beaver Dam
A man is an adult male human. Prior to adulthood, a male human is referred to as a boy (a male child or adolescent). Like most other male mammals, a man's genome usually inherits an X chromosome from the mother and a Y chromosome from the father. Sex differentiation of the male fetus is governed by the SRY gene on the Y chromosome. During puberty, hormones which stimulate androgen production result in the development of secondary sexual characteristics, thus exhibiting greater differences between the sexes. These include greater muscle mass, the growth of facial hair and a lower body fat composition. Male anatomy is distinguished from female anatomy by the male reproductive system, which includes the penis, testicles, sperm duct, prostate gland and the epididymis, and by secondary sex characteristics, including a narrower pelvis, narrower hips, and smaller breasts without mammary glands. Throughout human history, traditional gender roles have often defin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beaver Dam Quarry Plate XX WBClark 1898
Beavers are large, semiaquatic rodents in the genus ''Castor'' native to the temperate Northern Hemisphere. There are two extant species: the North American beaver (''Castor canadensis'') and the Eurasian beaver (''C. fiber''). Beavers are the second-largest living rodents after the capybaras. They have stout bodies with large heads, long chisel-like incisors, brown or gray fur, hand-like front feet, webbed back feet and flat, scaly tails. The two species differ in the shape of the skull and tail and fur color. Beavers can be found in a number of freshwater habitats, such as rivers, streams, lakes and ponds. They are herbivorous, consuming tree bark, aquatic plants, grasses and sedges. Beavers build dams and lodges using tree branches, vegetation, rocks and mud; they chew down trees for building material. Dams impound water and lodges serve as shelters. Their infrastructure creates wetlands used by many other species, and because of their effect on other organisms i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quarry
A quarry is a type of open-pit mine in which dimension stone, rock, construction aggregate, riprap, sand, gravel, or slate is excavated from the ground. The operation of quarries is regulated in some jurisdictions to reduce their environmental impact. The word ''quarry'' can also include the underground quarrying for stone, such as Bath stone. Types of rock Types of rock extracted from quarries include: *Chalk *China clay *Cinder *Clay *Coal * Construction aggregate (sand and gravel) * Coquina * Diabase *Gabbro *Granite * Gritstone *Gypsum *Limestone *Marble *Ores *Phosphate rock *Quartz *Sandstone * Slate *Travertine Stone quarry Stone quarry is an outdated term for mining construction rocks (limestone, marble, granite, sandstone, etc.). There are open types (called quarries, or open-pit mines) and closed types ( mines and caves). For thousands of years, only hand tools had been used in quarries. In the 18th century, the use of drilling and blasting operatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cockeysville, Maryland
Cockeysville is a census-designated place (CDP) in Baltimore County, Maryland, United States. The population was 20,776 at the 2010 census. History Cockeysville was named after the Cockey family who helped establish the town. Thomas Cockey (1676–1737) settled in Limestone Valley in 1725 at Taylor's Hall (an area now just north of Padonia Road and east of Interstate 83). Joshua Frederick Cockey (1765–1821) built one of the first homes in the area in 1798 and built the first commercial structure, a hotel, in 1810 in what would become the village of Cockeysville. His son, Judge Joshua F. Cockey (1800–1891), was a lifelong resident in the village. As a businessman before being appointed as judge, in the 1830s he built the train station (which would be a stop on the Pennsylvania Railroad) and accompanying commercial buildings. Cockeysville was the scene of some Civil War activity. Confederate soldiers pushed into the Baltimore area, intending to cut off the city and Washington fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northern Central Railway
The Northern Central Railway (NCRY) was a Class I Railroad connecting Baltimore, Maryland with Sunbury, Pennsylvania, along the Susquehanna River. Completed in 1858, the line came under the control of the Pennsylvania Railroad (PRR) in 1861, when the PRR acquired a controlling interest in the Northern Central's stock to compete with the rival Baltimore and Ohio Railroad (B&O). For eleven decades the Northern Central operated as a subsidiary of the PRR until much of its Maryland trackage was washed out by Hurricane Agnes in 1972, after which most of its operations ceased as the Penn Central declined to repair sections. It is now a fallen flag railway, having come under the control of the later Penn Central (merger of the PRR and the New York Central), Conrail, and then broken apart and disestablished. The northern part in Pennsylvania is now the York County Heritage Rail Trail which connects to a similar hike/bike trail in Northern Maryland down to Baltimore, named the Torrey ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dolomite (mineral)
Dolomite () is an anhydrous carbonate mineral composed of calcium magnesium carbonate, ideally The term is also used for a sedimentary carbonate rock composed mostly of the mineral dolomite. An alternative name sometimes used for the dolomitic rock type is dolostone. History As stated by Nicolas-Théodore de Saussure the mineral dolomite was probably first described by Carl Linnaeus in 1768. In 1791, it was described as a rock by the French naturalist and geologist Déodat Gratet de Dolomieu (1750–1801), first in buildings of the old city of Rome, and later as samples collected in the mountains now known as the Dolomite Alps of northern Italy. Nicolas-Théodore de Saussure first named the mineral (after Dolomieu) in March 1792. Properties The mineral dolomite crystallizes in the trigonal-rhombohedral system. It forms white, tan, gray, or pink crystals. Dolomite is a double carbonate, having an alternating structural arrangement of calcium and magnesium ions. Unless it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marble
Marble is a metamorphic rock composed of recrystallized carbonate minerals, most commonly calcite or Dolomite (mineral), dolomite. Marble is typically not Foliation (geology), foliated (layered), although there are exceptions. In geology, the term ''marble'' refers to metamorphosed limestone, but its use in stonemasonry more broadly encompasses unmetamorphosed limestone. Marble is commonly used for Marble sculpture, sculpture and as a building material. Etymology The word "marble" derives from the Ancient Greek (), from (), "crystalline rock, shining stone", perhaps from the verb (), "to flash, sparkle, gleam"; Robert S. P. Beekes, R. S. P. Beekes has suggested that a "Pre-Greek origin is probable". This Stem (linguistics), stem is also the ancestor of the English language, English word "marmoreal," meaning "marble-like." While the English term "marble" resembles the French language, French , most other European languages (with words like "marmoreal") more closely resemb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cockeysville Marble
The Cockeysville Marble is a Precambrian, Cambrian, or Ordovician marble formation in Baltimore, Carroll, Harford and Howard Counties, Maryland. It is described as a predominantly metadolomite, calc-schist, and calcite marble, with calc-gneiss and calc-silicate marble being widespread but minor.''Geologic Map of Maryland'', 1968. Cleaves, E. T., Edwards, J. Jr., and Glaser, J. D. Maryland Geological Survey. Scale 1:250,000. The extent of this formation was originally mapped in 1892 within Baltimore County. Quarrying The Cockeysville Marble has been quarried in Beaver Dam within Cockeysville and other locations in Maryland. A historical account is given in ''Maryland Geological Survey Volume Two''. The Cockeysville was also mined for crushed stone at what is now called Quarry Lake. (Greensberg Quarry), Bare Hills, Baltimore Co., Maryland, USA ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Washington Monument (Baltimore)
The Washington Monument is the centerpiece of intersecting Mount Vernon Place and Washington Place, an urban square in the Mount Vernon-Belvedere neighborhood north of downtown Baltimore, Maryland. It was the first major monument begun to honor George Washington (1732–1799). History The Monument, a colossal landmark column, was designed by American architect Robert Mills (1781–1855), who also designed the later Washington Monument on the National Mall in Washington, D.C. Construction began in 1815 on land donated by Colonel John Eager Howard (1752–1827), from his extensive "Belvidere" estate just north of Baltimore Town, and the masonry work was completed by 1829. The 178 foot, 8 inch doric column holds a ground-floor gallery offering digital exhibits about the construction of the Monument, the history of Mount Vernon and Washington Places neighborhood and of the life and accomplishments of General and President George Washington. Climbing the 227 steps to the top provide ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Washington Monument
The Washington Monument is an obelisk shaped building within the National Mall in Washington, D.C., built to commemorate George Washington, once commander-in-chief of the Continental Army (1775–1784) in the American Revolutionary War and the first President of the United States (1789–1797). Located almost due east of the Reflecting Pool and the Lincoln Memorial, the monument, made of marble, granite, and bluestone gneiss, is both the world's tallest predominantly stone structure and the world's tallest obelisk, standing tall according to the U.S. National Geodetic Survey (measured 2013–14) or tall, according to the National Park Service (measured 1884). It is the tallest monumental column in the world if all are measured above their pedestrian entrances. It was the tallest structure in the world between 1884 and 1889, after which it was overtaken by the Eiffel Tower in Paris. Previously, the tallest structure was the Cologne Cathedral. Construction of the presidenti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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