fall line

fall line
   (not recommended: obsolete)
   An imaginary line or narrow zone connecting the water falls on several adjacent or near-parallel rivers, marking the points where these rivers make a sudden descent from an upland to a lowland, as at the edge of a plateau; specifically, the Fall Line marking the boundaries between the ancient, resistant crystalline rocks of the Piedmont Plateau and the younger, softer sediments of the Atlantic Coastal Plain of the Eastern United States. It also marks the limit of navigability of the rivers. Now considered an archaic term because Coastal Plain materials occur several miles west or inland of the Fall Line and current research is showing it to be a broad zone of high-angle reverse faults.
   GG

Glossary of landform and geologic terms. 2013.

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  • Fall Line — [ fɔ:l lain] ist der Übergang zwischen dem harten Gestein im Piedmont und den weicheren Bodenschichten in der Küstenebene an der Ostküste der Vereinigten Staaten. Östlich dieser am Rand der Appalachen verlaufenden etwa 1500 km langen… …   Deutsch Wikipedia

  • fall line — ☆ fall line n. 1. the geographical line indicating the beginning of a plateau, usually marked by many waterfalls and rapids 2. Skiing the line of direct descent down a hill …   English World dictionary

  • Fall Line — the line east of the Appalachian Mountains, marking the end of the coastal plains and the beginning of the Piedmont Plateau …   English World dictionary

  • fall line — fall′ line n. 1) geg the natural boundary between an upland and a lowland, as a piedmont and a coastal plain: marked, in temperate or humid areas, by waterfalls and rapids 2) spo Skiing. the path of natural descent from one point on a slope to… …   From formal English to slang

  • Fall line — In geomorphology, a fall line (at times referred to as a fall zone) marks the area where an upland region (continental bedrock) and a coastal plain (coastal alluvia) meet. Technically, a fall line is an unconformity. A fall line is typically… …   Wikipedia

  • fall line — noun 1. : a line joining the waterfalls on a number of rivers that marks the point where each river descends from the upland to the lowland and the limit of its navigability 2. : the natural downward course (as for skiing) between two points on a …   Useful english dictionary

  • fall line — 1. an imaginary line, marked by waterfalls and rapids, where rivers descend abruptly from an upland to a lowland. 2. (caps.) Eastern U.S. the imaginary line between the Piedmont and the Atlantic coastal plain. 3. Skiing. the path of natural… …   Universalium

  • fall line — noun 1》 (the fall line) Skiing the route leading straight down any particular part of a slope. 2》 a narrow zone marking the geological boundary between an upland region and a plain, distinguished by the occurrence of falls where rivers cross it …   English new terms dictionary

  • Fall Line — Sp Núolydžio linija Ap Fall Line L pakopa tarp Pidmonto plyn. ir Atlanto pakrantės žem., JAV (Džordžija, P. ir Š. Karolina, Virdžinija) …   Pasaulio vietovardžiai. Internetinė duomenų bazė

  • Fall Line Studio — Fall Line Studios Logo de Fall Line Studios Création novembre 2006 Disparition 2009 …   Wikipédia en Français

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