Becquerel is a 167 km-diameter crater at 22.1°N, 352.0°E on Mars, in Arabia Terra in Oxia Palus quadrangle. It is named after Antoine H. Becquerel. Photographs by the Mars Global Surveyor revealed layered sedimentary rocks in the crater. The layers appear to be only a few meters thick and show little variations in thickness. Recent studies with HiRISE have determined the exact thickness of the layers. The 66 layers measured showed one group of layers to average 3.6 metres (12 ft) and another group to average 36 metres (118 ft) in thickness. Patterns like this are usually produced on Earth through the effects of water; volcanic deposits would not produce ash or laval flows of such regular thickness and in any event, there are no nearby volcanic vents.
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| - Becquerel (Marskrater) (de)
- Becquerel (Martian crater) (en)
- Becquerel (cráter marciano) (es)
- Cratere Becquerel (Marte) (it)
- Becquerel (cratera marciana) (pt)
- 貝克勒撞擊坑 (火星) (zh)
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| - Becquerel ist ein etwa 165 km großer Kater auf dem Planeten Mars. (de)
- Becquerel es un cráter de impacto del planeta Marte en Arabia Terra, a 22.1 N y 8 O. El impacto causó un cráter de 171 kilómetros de diámetro. El nombre fue aprobado en 1973 en honor al físico francés Antoine H. Becquerel. (es)
- Becquerel è un cratere sulla superficie di Marte. Il cratere è dedicato al fisico francese Antoine Henri Becquerel. (it)
- 貝克勒撞擊坑（英語：Becquerel）是一個位於火星阿拉伯高地直徑167公里的撞擊坑，以法國物理學家亨利·贝可勒尔命名。 (zh)
- Becquerel is a 167 km-diameter crater at 22.1°N, 352.0°E on Mars, in Arabia Terra in Oxia Palus quadrangle. It is named after Antoine H. Becquerel. Photographs by the Mars Global Surveyor revealed layered sedimentary rocks in the crater. The layers appear to be only a few meters thick and show little variations in thickness. Recent studies with HiRISE have determined the exact thickness of the layers. The 66 layers measured showed one group of layers to average 3.6 metres (12 ft) and another group to average 36 metres (118 ft) in thickness. Patterns like this are usually produced on Earth through the effects of water; volcanic deposits would not produce ash or laval flows of such regular thickness and in any event, there are no nearby volcanic vents. (en)
- Becquerel é uma cratera medindo 167 km de diâmetro loclizada a 22.1°N, 352.0°E em Marte, na região de Arabia Terra. Fotografias obtidas pela Mars Global Surveyor revelaram depósitos sedimentares espetaculares nessa cratera. As camadas aparentam ter uma espessura de apenas poucos metros e apresentam poucas variações na espessura. Estudos recentes da HiRISE determinaram a espessura exata das camadas em Becquerel. As 66 camadas medidas mostraram que um grupo de camadas mede em média 3.6 metros e outro grupo mede em média 36 metros de espessura. Padrões como este geralmente são produzidos na Terra pela ação da água; depósitos vulcânicos não produziriam cinzas ou fluxos de lava em uma espessura tão regular, e não há nenhuma fenda vulcânica por perto. (pt)
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| - Viking Orbiter 1 mosaic with Becquerel at center (en)
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| - Becquerel is a 167 km-diameter crater at 22.1°N, 352.0°E on Mars, in Arabia Terra in Oxia Palus quadrangle. It is named after Antoine H. Becquerel. Photographs by the Mars Global Surveyor revealed layered sedimentary rocks in the crater. The layers appear to be only a few meters thick and show little variations in thickness. Recent studies with HiRISE have determined the exact thickness of the layers. The 66 layers measured showed one group of layers to average 3.6 metres (12 ft) and another group to average 36 metres (118 ft) in thickness. Patterns like this are usually produced on Earth through the effects of water; volcanic deposits would not produce ash or laval flows of such regular thickness and in any event, there are no nearby volcanic vents. There are cyclic variations in the thickness of the exposed sedimentary layers, possibly indicating cyclic variations in environmental conditions while the sediment was being laid down. Most of the layers are parallel to each other, suggesting they formed by vertical settling, but a few are cross-bedded, indicating that at the time that the layers were deposited the sediment was transported along the ground surface by wind or water. The sedimentary material appears to be easily eroded and active wind erosion may be continuing to the current day. Parts of the mound in Becquerel crater show , These may be the result of a salt diapir. On Earth these are associated with methane seepage. Perhaps the methane detected on Mars from time to time is coming from these faults. Some parts of Becquerel show light-toned layers. Light-toned rocks on Mars have been associated with hydrated minerals like sulfates. The Mars Rover Opportunity examined such layers close-up with several instruments. Scientists are excited about finding hydrated minerals such as sulfates and clays on Mars because they are usually formed in the presence of water. Places that contain clays and/or other hydrated minerals would be good places to look for evidence of life. Many craters once contained lakes. Because some crater floors show deltas, we know that water had to be present for some time. Dozens of deltas have been spotted on Mars. Deltas form when sediment is washed in from a stream entering a quiet body of water. It takes a bit of time to form a delta, so the presence of a delta is exciting; it means water was there for a time, maybe for many years. Primitive organisms may have developed in such lakes; hence, some craters may be prime targets for the search for evidence of life on the Red Planet. (en)
- Becquerel ist ein etwa 165 km großer Kater auf dem Planeten Mars. (de)
- Becquerel es un cráter de impacto del planeta Marte en Arabia Terra, a 22.1 N y 8 O. El impacto causó un cráter de 171 kilómetros de diámetro. El nombre fue aprobado en 1973 en honor al físico francés Antoine H. Becquerel. (es)
- Becquerel è un cratere sulla superficie di Marte. Il cratere è dedicato al fisico francese Antoine Henri Becquerel. (it)
- Becquerel é uma cratera medindo 167 km de diâmetro loclizada a 22.1°N, 352.0°E em Marte, na região de Arabia Terra. Fotografias obtidas pela Mars Global Surveyor revelaram depósitos sedimentares espetaculares nessa cratera. As camadas aparentam ter uma espessura de apenas poucos metros e apresentam poucas variações na espessura. Estudos recentes da HiRISE determinaram a espessura exata das camadas em Becquerel. As 66 camadas medidas mostraram que um grupo de camadas mede em média 3.6 metros e outro grupo mede em média 36 metros de espessura. Padrões como este geralmente são produzidos na Terra pela ação da água; depósitos vulcânicos não produziriam cinzas ou fluxos de lava em uma espessura tão regular, e não há nenhuma fenda vulcânica por perto. Há variações cíclicas na espessura das camadas sedimentares expostas, indicando possívelmente variações cíclicas nas condições ambientais enuqanto os sedimentos se depositaram. A maior parte das camadas são paralelas umas às outras, sugerindo que elas se formaram por deposição vertical, mas algumas poucas são intercruzadas, indicando que durante o período em que as camadas foram depositadas o sedimento foi transportado ao longo da superfície pelo vento ou água. O material sedimentar aparenta ser bem suscetível à erosão e o processo de erosão eólica pode estar ocorrendo ainda nos dias de hoje. A cratera recebeu este nome em referência a Antoine H. Becquerel. (pt)
- 貝克勒撞擊坑（英語：Becquerel）是一個位於火星阿拉伯高地直徑167公里的撞擊坑，以法國物理學家亨利·贝可勒尔命名。 (zh)
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