Yankin rairayin bakin teku

Yankin rairayin bakin teku''', wanda aka fi sani da ko dai rairayin rairayin ƙanƙara ko rairayin dutse, wani rairayin mallaka ne wanda ya kunshi dutse mai laushi, mai laushi. Girgizar (shingle) yawanci ya kunshi mai santsi, spheroidal zuwa shimfiɗa, duwatsu, shimfiɗawa, kuma wani lokacin ƙananan duwatsu, gabaɗaya  20 zuwa 200 millimeters (0.8 zuwa 7.9 in) girman kewayon. Yankunan rairayin bakin teku''' yawanci suna da gangara mai tsawo a bangarorin su na ƙasa da na teku. Yankunan rairayin bakin teku sun samo asali ne a wuraren da ke cike da raƙuman ruwa inda tsaunuka masu tsayayya ke samar da tarkace-girka. Hakanan ana samun su a cikin manyan latitudes da gabar teku inda rushewar ajiyar glacial na Quaternary ke samar da raguwar dutse mai girman dutse. An fi amfani da wannan kalmar a Biritaniya.Neuendorf, Klaus K.E. Mehl, James P., Jr. Jackson, Julia A., 2011. Glossary of Geology (5th Edition). American Geosciences Institute. Narayana, A. C., 2016. Coastal landforms. in Kennish, M.J., ed., pp. 143–157, Encyclopedia of Estuaries. Springer: Dordrecht, The Netherlands. McGraw-Hill, 2002. McGraw-Hill Dictionary of Earth Science (2nd edition). The McGraw-Hill Companies, New York. 
Duk da yake ana samun irin wannan rairayin bakin teku a Turai, ana samun misalai a Bahrain, Arewacin Amurka, da sauran yankuna na duniya, kamar yammacin gabar tekun Tsibirin Kudancin New Zealand, inda suke da alaƙa da magoya bayan shingle na koguna. Kodayake an halicce su a bakin teku, bayan sake dawowa na kankara na iya ɗaga rairayin bakin teku har zuwa mita 200 (660  sama da matakin teku, kamar yadda yake a kan Babban Tekun a Sweden. [ana buƙatar ƙa'ida][

Tsarin halittu da aka kafa ta wannan haɗin dutse da yashi ya ba da damar mulkin mallaka ta hanyar nau'o'in da ba su da yawa da ke cikin haɗari.

 Kafawa 
Yankin rairayin bakin teku na Shingle yawanci suna da tsayi, saboda raƙuman ruwa suna gudana cikin sauƙi ta hanyar rairayin kan rairayin rairayin mallaka, suna rage tasirin rushewar baya da kuma kara yawan samar da laka a cikin rairayin da ke da tsayi.

 Yawon shakatawa 

Yankin rairayin bakin teku na Shingle ba su da yawa, sun ƙunshi dubban duwatsu masu santsi tare da halaye daban-daban na yanayin ƙasa. Tekun ta halitta yana sassauƙa da duwatsu daban-daban a tsawon lokaci tare da raƙuman ruwa. Yankin rairayin bakin teku na Shingle sananne ne ga nau'ikan dutse daban-daban da za'a iya samu.

 Manazarta