File:ISS061E098033 (Valley-and-Ridge) lrg.jpg
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English: The Susquehanna River cuts through the folds of the Valley-and-Ridge province of the Appalachian Mountains in this photograph taken by an astronaut onboard the International Space Station. Harrisburg, Pennsylvania, and a few smaller towns stand along the banks of the river.
The Valley-and-Ridge province is a section of the larger Appalachian Mountain Belt between the Appalachian Plateau and the Blue Ridge physiographic provinces. The northeast-southwest trending ridges are composed of Early Paleozoic sedimentary rocks. The valleys between them were made of softer rocks (limestone and shales) that were more susceptible to erosion; they are now occupied by farms. The Susquehanna River cuts through several ridges as it flows south. The Susquehanna River flows 444 mi (714 kilometers) from upstate New York to Maryland, draining into Chesapeake Bay. The Susquehanna watershed covers more than 27,000 square miles (70,000 square kilometers) and is the source of more than half of the fresh water in the Bay. Farms like the ones in this photograph are a mainstay of Pennsylvania’s economy. However, they also contribute a large influx of nutrient and sediment pollution flowing into the Bay.Deutsch: Der Susquehanna River schneidet sich auf diesem Bild, das ein Astronaut an Bord der Internationalen Raumstation (ISS) aufgenommen hat, durch die Falten der Valley-and-Ridge-Provinz der Appalachian Mountains. Harrisburg, Pennsylvania und einige kleinere Städte befinden sich an den Ufern des Flusses.
Die Valley-and-Ridge-Provinz ist ein Teil des größeren Appalachian Mountain Belt zwischen dem Appalachian Plateau und der Blue-Ridge-Provinz. Die von Nordosten nach Südwesten streichenden Bergrücken entstanden als Sedimentgestein im Frühen Paläozoikum. Die Täler dazwischen bestehen aus weicherem Gestein (Kalkstein und Schiefer), das anfälliger für Erosion war; hier befinden sich nun landwirtschaftliche Betriebe. Der Susquehanna River schneidet sich auf seinem Weg südwärts durch mehrere Bergrücken. Der Susquehanna River fließt über eine Länge von 714 Kilometern von Upstate New York nach Maryland, wo er in die Chesapeake Bay mündet. Das Susquehanna-Einzugsgebiet umfaßt über 70.000 Quadratkilometer und sorgt für mehr als die Hälfte des Süßwassers in der Bucht. Farmen wie auf diesem Bild sind ein Standpfeiler der Wirtschaft Pennsylvanias. Allerdings tragen sie auch zu einem Großteil zur Sättigung mit Nährstoffen und Verschmutzung bei, die in die Chesapeake Bay eingetragen wird. |
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| Source | https://earthobservatory.nasa.gov/images/146570/rolling-through-the-appalachians |
| Author | Astronaut photograph ISS061-E-98033 was acquired on December 24, 2019, with a Nikon D5 digital camera using an 800 millimeter lens and is provided by the ISS Crew Earth Observations Facility and the Earth Science and Remote Sensing Unit, Johnson Space Center. The image was taken by a member of the Expedition 61 crew. The image has been cropped and enhanced to improve contrast, and lens artifacts have been removed. Additional images taken by astronauts and cosmonauts can be viewed at the NASA/JSC Gateway to Astronaut Photography of Earth. Caption by Laura Phoebus, Jacobs, JETS Contract at NASA-JSC. |
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This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) |  |
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| current | 22:32, 10 May 2020 | | 5,568 × 3,712 (5.76 MB) | Matthiasb (talk | contribs) | {{Information |description ={{en|1=The Susquehanna River cuts through the folds of the [https://www.nps.gov/articles/valleyandridgeprovince.htm Valley-and-Ridge] province of the [https://earthobservatory.nasa.gov/images/80088/appalachian-mountains Appalachian Mountains] in this photograph taken by an astronaut onboard the International Space Station. Harrisburg, Pennsylvania, and a few smaller towns stand along the banks of the river. The Valley-and-Ridge province is a section of the large... |
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