A nahiyar gangara - shi ... Features na wani tsarin da iri na nahiyar gangara

Ocean kunshi dama tsarin abubuwa. A nahiyar gangara - wannan shi ne daya daga cikinsu. Abin da shi ne da kuma inda ne? Wannan za ka koya daga wannan labarin.

A nahiyar gangara - yana da ...

Labarin kasa da karatu ba ne kawai ƙasar, amma kuma da cewa an located a karkashin ruwa. Musamman, da binciken na karkashin ruwa topography teku ta musamman kimiyya horo - oceanography.

Ocean kasa kunshi dama tsarin sassa. A nahiyar gangara - wannan shi ne sauyin yankin tsakanin shiryayye located sama, da kuma abin da ake kira gado daga cikin teku, located a kasa. A kan talakawan, shi ne located a zurfin jere daga 200 zuwa 2000 mita.

Geologically, nahiyar gangara - mai matukar ci gaba da nahiyar ƙasar. Wannan nau'i na karkashin ruwa ƙasa bambanta da yawa m gangara, wanda zai iya isa 30-40 digiri. Very sau da yawa shi ne wuya da babbar m matakai, canyons, ridges da cliffs. Sau da yawa samu a nahiyar gangara da kuma karkashin ruwa landslides cewa faruwa a karkashin mataki na nauyi.

A nahiyar gangara - wannan shi ne mai gwada kunkuntar rabo daga seabed wanda, duk da haka, shi ne game da 12% na duniya tekuna.

Features na tsarin da nahiyar gangara

Domin nahiyar gangara ne ba halayyar mai santsi surface. Conversely, kasa kashi ne daban-daban lokacin farin ciki da fairly zurfi karya sauƙi. Yana da matukar kowa ga zurfin ravines da kwaruruka. Tare da babba gangara sau da yawa slide manyan talakawa na dutse, ya kafa turbid fluxes da igiyoyin.

A nahiyar gangara a sassa daban daban na duniya ba daya suke ba, kuma suka sãɓã wa jũna a cikin zurfin, tsawon da gangara. Alal misali, kashe bakin tekun na Australia zurfin nahiyar gangara iya zama kilomita biyar da nisa daga 150-200 km. Amma a kusa da nahiyar gangaren Afirka ta Kudu ya bambanta furta tako tsarin.

Babbar karkashin ruwa mataki da oceanographers gano a kan karkata daga cikin Arctic Ocean. A nan, ya zuwa yanzu ƙarƙashin ruwa ke Chukchi Cap, inda ya kasance kafa uku iko karkashin ruwa ridges.

The main iri nahiyar gangara

Masana kimiyya conventionally raba duk na nahiyar gangara zuwa cikin uku kayyade iri:

• denudation.
• accumulative.
• denudation-accumulative.

A nahiyar gangara denudation matakai fi yawa irin dutse, halakarwa. A accumulative akasin haka, rinjaya aiwatar da jari na ma'aunan kasa kaya. A nahiyar gangaren irin wannan yawanci kunshi clastic sediments ko yashi. Denudation-accumulative nahiyar gangara wakiltar wani sauyin irin tsakanin sama embodiments gangara.

A general, babban "bayarwa" ma'aunan kasa sedimentary abu ga wani daga cikin nahiyar gangara ne shiryayye. Rocks wanke da karkashin ruwa igiyoyin da shi da kuma shirya a kasa kamar yadda yadudduka da daban-daban thicknesses.