Mai tafiya
 Mai tafiya |
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A cikin ilimin ƙasa da ilimin ƙasa pediplain (daga Latin pes, genitive case pedis, ma'ana "ƙafa") fili ne mai faɗi wanda aka kafa ta hanyar haɗin gwiwar pediments. Hanyoyin da aka sani da siffofin pediplains a matsayin pediplanation. Ka'idodin pediplain da pediplanation sun fara ne daga masanin ilimin ƙasa Lester Charles King a cikin littafinsa na 1942 South African Scenery . Wannan ra'ayi ya sami sananne yayin da aka haɗa shi da peneplanation.[1]
Ƙungiyoyin da ke cikin pediplains na iya samar da jerin gangaren da ke da kyau. Babban bambanci na Pediplains ga W. M. Davis" peneplains yana cikin tarihi da matakai a baya, kuma ƙasa da haka a cikin siffar ƙarshe. Wataƙila bambancin da ya fi shahara a cikin siffar da za ta iya kasancewa shine na tsaunuka da suka rage waɗanda a cikin Davis" peneplains za su sami gangara mai laushi yayin da a cikin pediplains ya kamata su sami irin wannan tsayi kamar gangara a farkon matakan rushewa wanda ke haifar da pediplanation.[2]
Pediplanation yana da alaƙa da raguwa ta hanyar da ke biyowa: yayin da raguwa ke raguwa a kan ƙuƙwalwar lokaci ke ƙaura kuma yana faɗaɗa a kan manyan wurare. Sakamakon shi ne cewa farfajiyar ta lalace musamman a baya kuma cewa lalacewar ƙasa tana da iyaka.[1] Ya bambanta da ra'ayoyin peneplain na yau da kullun da yawa pediplains na iya samuwa a lokaci guda a tsawo daban-daban kuma ba lallai ba ne su sami matsayi zuwa matakin tushe. Ana samar da pediplains a yankunan da ke da busasshiyar yanayi. Kamar yadda sauye-sauyen yanayi ya bushe da kuma rabin-arid lokutan pediplanation na iya canzawa tare da karin zafi lokutan etchplanation wanda ke haifar da samar da shimfidar wurare (peneplains) na cakuda asali (polygenetic). [3]
Cryoplanation wani bambanci ne na pediplanation wanda aka ƙuntata ga yanayin sanyi.
Manazarta
[gyara sashe | gyara masomin]- ↑ 1.0 1.1 Twidale, C.R. (1992). "King of the plains: Lester King's contributions to geomorphology". Geomorphology. 5 (6): 491–499. Bibcode:1992Geomo...5..491T. doi:10.1016/0169-555x(92)90021-f. Cite error: Invalid
<ref>tag; name "Twidale" defined multiple times with different content - ↑ King, L.C. (1953). "Canons of landscape evolution". Geological Society of America Bulletin. 64 (7): 721–752. doi:10.1130/0016-7606(1953)64[721:cole]2.0.co;2.
- ↑ Fairbridge, Rhodes W.; Finkl Jr., Charles W. (1980). "Cratonic erosion unconformities and peneplains". The Journal of Geology. 88 (1): 69–86. Bibcode:1980JG.....88...69F. doi:10.1086/628474.