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Fall Line
A fall line (or fall zone) is the area where an upland region and a coastal plain meet and is typically prominent where rivers cross it, with resulting rapids or waterfalls. The uplands are relatively hard crystalline basement rock, and the coastal plain is softer sedimentary rock. A fall line often will recede upstream as the river cuts out the uphill dense material, forming "c"-shaped waterfalls and exposing bedrock shoals. Because of these features, riverboats typically cannot travel any farther inland without portaging, unless locks are built. The rapid change in elevation of the water and resulting energy release make the fall line a good location for water mills, grist mills, and sawmills. Seeking a head of navigation with a ready supply of water power, people have long made settlements where rivers cross a fall line. Geography The slope of fall zones on rivers played a role in settlement patterns. For example, the fall line represents the inland limit of navigation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coastal Plain
A coastal plain is flat, low-lying land adjacent to a sea coast. A fall line commonly marks the border between a coastal plain and a piedmont area. Some of the largest coastal plains are in Alaska and the southeastern United States. The Gulf Coastal Plain of North America extends northwards from the Gulf of Mexico along the Lower Mississippi River to the Ohio River, which is a distance of about . The Atlantic Coastal Plain runs from the New York Bight to Florida. The Coastal Plains of India lie on either side of the Deccan Plateau, along the western and eastern coasts of India. They extend for about 6,150 km from the Rann of Kutch in the west to West Bengal in the east. They are broadly divided into the Western Coastal Plains and the Eastern Coastal Plains. The two coastal plains meet at Kanyakumari, the southernmost tip of the Indian mainland. The eastern coastal plain is located between The Bay of Bengal and the eastern Ghats and the western coastal plain is located betwee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fault (geology)
In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tectonic forces, with the largest forming the boundaries between the plates, such as the megathrust faults of subduction zones or transform faults. Energy release associated with rapid movement on active faults is the cause of most earthquakes. Faults may also displace slowly, by aseismic creep. A ''fault plane'' is the plane that represents the fracture surface of a fault. A '' fault trace'' or ''fault line'' is a place where the fault can be seen or mapped on the surface. A fault trace is also the line commonly plotted on geologic maps to represent a fault. A ''fault zone'' is a cluster of parallel faults. However, the term is also used for the zone of crushed rock along a single fault. Prolonged motion along closely spaced faults can blur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trenton, New Jersey
Trenton is the capital city of the U.S. state of New Jersey and the county seat of Mercer County. It was the capital of the United States from November 1 to December 24, 1784.New Jersey County Map New Jersey Department of State. Accessed July 10, 2017. The city's metropolitan area, including all of Mercer County, is grouped with the New York combined statistical area by the U.S. Census Bureau, b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Passaic River
Passaic River ( ) is a river, approximately long, in Northern New Jersey. The river in its upper course flows in a highly circuitous route, meandering through the swamp lowlands between the ridge hills of rural and suburban northern New Jersey, called the Great Swamp, draining much of the northern portion of the state through its tributaries. In its lower portion, it flows through the most urbanized and industrialized areas of the state, including along downtown Newark. The lower river suffered from severe pollution and industrial abandonment in the 20th century. In April 2014, the U.S. Environmental Protection Agency (EPA) announced a $1.7 billion plan to remove of toxic mud from the bottom of lower of the river. It is considered one of the most polluted stretches of water in the nation and the project one of the largest clean-ups ever undertaken. Course The Passaic rises in the center of Mendham, in southern Morris County. The river begins at Dubourg Pond located betwee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paterson, New Jersey
Paterson ( ) is the largest city in and the county seat of Passaic County, in the U.S. state of New Jersey.New Jersey County Map . Accessed July 10, 2017. As of the , its population was 159,732, rendering it New Jersey's third-most-populous city. The [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Potomac River
The Potomac River () drains the Mid-Atlantic United States, flowing from the Potomac Highlands into Chesapeake Bay. It is long,U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map. Retrieved August 15, 2011 with a drainage area of 14,700 square miles (38,000 km2), and is the fourth-largest river along the East Coast of the United States and the 21st-largest in the United States. Over 5 million people live within its watershed. The river forms part of the borders between Maryland and Washington, D.C. on the left descending bank and between West Virginia and Virginia on the right descending bank. Except for a small portion of its headwaters in West Virginia, the North Branch Potomac River is considered part of Maryland to the low-water mark on the opposite bank. The South Branch Potomac River lies completely within the state of West Virginia except for its headwaters, which lie in Virginia. Course The Potomac River r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Congaree River
The Congaree River is a short but wide river in South Carolina in the United States; It flows for approximately 53 miles (85 km). The river serves an important role as the final outlet channel for the entire Lower Saluda and Lower Broad watersheds, before merging with the Wateree River just north of Lake Marion to form the Santee River. It is formed in Columbia by the confluence of the Saluda and Broad rivers near the Piedmont Fall Line. It serves as part of the boundary between Richland, Calhoun, and Lexington counties. The only cities near the river are Columbia on the east, and Cayce and West Columbia on the west. Despite the vast bottomland swamp below Columbia, the Congaree is navigable along much of its length at high water by barge traffic. This travels upriver from the Port of Charleston (approximately 100 miles (167 km) away through the Santee-Cooper Lakes to within 5 miles (8 km) of the fall line. The Congaree National Park, one of the main r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Columbia, South Carolina
Columbia is the List of capitals in the United States, capital of the U.S. state of South Carolina. With a population of 136,632 at the 2020 United States census, 2020 census, it is List of municipalities in South Carolina, the second-largest city in South Carolina. The city serves as the county seat of Richland County, South Carolina, Richland County, and a portion of the city extends into neighboring Lexington County, South Carolina, Lexington County. It is the center of the Columbia metropolitan area (South Carolina), Columbia metropolitan statistical area, which had a population of 829,470 in 2020 and is the List of metropolitan statistical areas, 72nd-largest metropolitan statistical area in the nation. The name Columbia (name), Columbia is a poetic term used for the United States, derived from the name of Christopher Columbus, who explored for the Spanish Crown. Columbia is often abbreviated as Cola, leading to its nickname as "Soda City." The city is located about north ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James River
The James River is a river in the U.S. state of Virginia that begins in the Appalachian Mountains and flows U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map , accessed April 1, 2011 to Chesapeake Bay. The river length extends to if one includes the Jackson River, the longer of its two source tributaries. It is the longest river in Virginia. Jamestown and Williamsburg, Virginia's first colonial capitals, and Richmond, Virginia's current capital, lie on the James River. History The Native Americans who populated the area east of the Fall Line in the late 16th and early 17th centuries called the James River the Powhatan River, named for the chief of the Powhatan Confederacy which extended over most of the Tidewater region of Virginia. The Jamestown colonists who arrived in 1607 named it "James" after King James I of England (), as they constructed the first permanent English settlement in the Americas at Jamestown alo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Richmond, Virginia
(Thus do we reach the stars) , image_map = , mapsize = 250 px , map_caption = Location within Virginia , pushpin_map = Virginia#USA , pushpin_label = Richmond , pushpin_map_caption = Location within Virginia##Location within the contiguous United States , pushpin_relief = yes , coordinates = , subdivision_type = Country , subdivision_name = , subdivision_type1 = State , subdivision_name1 = , established_date = 1742 , , named_for = Richmond, United Kingdom , government_type = , leader_title = Mayor , leader_name = Levar Stoney ( D) , total_type = City , area_magnitude = 1 E8 , area_total_sq_mi = 62.57 , area_land_sq_mi = 59.92 , area_water_sq_mi = 2.65 , elevation_m = 50.7 , elevation_ft = 166.45 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Little Falls (Potomac River)
Little Falls is an area of rapids located where the Potomac River crosses the Atlantic Seaboard fall line where Washington, DC, Maryland and Virginia meet. Descending from the harder and older rocks of the Piedmont Plateau to the softer sediments of the Atlantic coastal plain, it is the first upstream "cataract", or barrier, to navigation encountered on the Potomac River. It may be viewed from the heavily trafficked Chain Bridge, about a half mile downstream. It is named in contradistinction to Great Falls, about 5 miles further upstream. Captain John Smith (1580–1631) of England was the first European to explore the Potomac as far as Little Falls. When he arrived there in 1608 he noted that "as for deer, buffaloes, bears and turkeys, the woods do swarm with them and the soil is extremely fertile."Gernand and Netherton, ''Falls Church'', p. 13, citing Fairfax Harrison, ''The Landmarks of Old Prince William'', pp. 143, 148. By 1757, the name of a nearby Anglican Church build ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sediment
Sediment is a naturally occurring material that is broken down by processes of weathering and erosion, and is subsequently transported by the action of wind, water, or ice or by the force of gravity acting on the particles. For example, sand and silt can be carried in suspension in river water and on reaching the sea bed deposited by sedimentation; if buried, they may eventually become sandstone and siltstone ( sedimentary rocks) through lithification. Sediments are most often transported by water ( fluvial processes), but also wind (aeolian processes) and glaciers. Beach sands and river channel deposits are examples of fluvial transport and deposition, though sediment also often settles out of slow-moving or standing water in lakes and oceans. Desert sand dunes and loess are examples of aeolian transport and deposition. Glacial moraine deposits and till are ice-transported sediments. Classification Sediment can be classified based on its grain size, grain s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
