Rashin da aka yi
 Rashin da aka yi | |
|---|---|
 | |
| Bayanai | |
| Ƙaramin ɓangare na |
natural geographic object (en)  da natural physical object (en) |
| Kayan haɗi | duwatsu |
| Karatun ta |
stratigraphy (en) da ilmin duwatsu |
Wani outcrop ko dutse outcrop ne bayyane fallasawa na bedrock ko tsoffin superficial deposits a farfajiyar Duniya da sauran duniya taurari.
Abubuwan da ke ciki
[gyara sashe | gyara masomin]Yankunan ba su rufe mafi yawan ƙasa duniya ba saboda a mafi yawan wurare dutse ko ajiyar ƙasa an rufe su da ƙasa da ciyayi kuma ba za a iya gani ko bincika su sosai ba. Koyaya, a wuraren da aka cire murfin da ke sama ta hanyar rushewa ko haɓaka tectonic, ana iya fallasa dutsen, ko kuma ya fito. Irin wannan bayyanar za ta faru akai-akai a yankunan da rushewa ke da sauri kuma ya wuce yawan yanayi kamar a kan tsaunuka masu tsawo, tsaunuka da tsaunuka, bankunan kogi, da wuraren da ke aiki. A Finland, rushewar ƙanƙara a lokacin mafi girman kankara na ƙarshe (c. 11000 BC), wanda ya biyo bayan raƙuman ruwa na teku, wanda ya biyo baya da isostatic uplift ya samar da kyawawan raƙuman bakin teku da na bakin teku.
Za'a iya fallasa dutse da ajiyar ƙasa a saman duniya saboda binciken ɗan adam kamar su dutse da gina hanyoyin sufuri.
Nazarin
[gyara sashe | gyara masomin]Outcrops yana ba da damar lura kai tsaye da samfurori na dutse a wurin don nazarin ilimin ƙasa da ƙirƙirar taswirar ƙasa. Ma'aunin a cikin wuri yana da mahimmanci don nazarin tarihin ilimin ƙasa kuma saboda haka abubuwan da suka fito suna da matukar muhimmanci don fahimtar sikelin lokacin ilimin ƙasa na tarihin duniya. Wasu daga cikin nau'ikan bayanai da ba za a iya samu ba sai dai daga dutsen dutse ko ta hanyar yin amfani da takamaiman gyare-gyare da gyare- gyare-gare, gyare-gwaje na gado, foliation), gyare-gine na gyare-rikice (misali jagororin paleo-current, grading, canje-canje na facies), gyarewar paleomagnetic. Outcrops kuma suna da mahimmanci don fahimtar tarin burbushin halittu, da paleo-environment, da juyin halitta yayin da suke samar da rikodin canje-canje na dangi a cikin yanayin ƙasa.
Cikakken bayanin, taswirar, da samfurori don nazarin dakin gwaje-gwaje na abubuwan da suka faru sun ba da damar duk kimiyyar ilimin ƙasa da ci gaban ka'idojin ilimin ƙasa irin su dokar haɗuwa, ka'idar asalin asali, ka'ida ta ci gaba ta gefe, da ka'idar maye gurbin dabbobi.
Nau'o'in tsaunuka
[gyara sashe | gyara masomin]Yaduwa suna faruwa a cikin nau'o'i da yawa, gami da, amma ba a iyakance su ba: [1]
- Dutsen
- Tors
- Tushen dutse
- Inselbergs
Misalan
[gyara sashe | gyara masomin]A kan taswirar Ordnance Survey a Biritaniya, ana rarrabe dutsen dutse daga outcrops: dutsen dutsen suna da layi mai ci gaba tare da gefen saman tare da layin da ke fitowa ƙasa; outcrops suna da layi na ci gaba a kusa da kowane yanki na dutse. Misali a California shine Vasquez Rocks, wanda aka saba da amfani da shi a cikin fina-finai da yawa, wanda ya ƙunshi dutse mai tsawo.[2][3] Yana wani misali ne na fitowar, wanda ke cikin gundumar Uttara Kannada a Karnataka, Indiya.
Serrote Branco outcrop in Caicó, Brazil
Precambrian outcrop in Finland
Granite outcrops at Silesian Stones Mountain in southwestern Poland
Outcrop near Yana, India
Outcrop of the Roubidoux Formation in the Ozarks of southern Missouri
Outcrop in the Vasquez Rocks Natural Area Park of southern California
Valley of Desolation in the Camdeboo National Park
Manazarta
[gyara sashe | gyara masomin]- ↑ Fitzsimons, James A.; Michael, Damian R. (2017-07-01). "Rocky outcrops: A hard road in the conservation of critical habitats". Biological Conservation. Small Natural Features. 211: 36–44. doi:10.1016/j.biocon.2016.11.019. ISSN 0006-3207.
- ↑ "oxy.edu. Vazquez Rocks. access date:5/22/2010". Archived from the original on 2011-06-08. Retrieved 2010-05-24.
- ↑ "parks.lacounty.gov. Vazquez Rocks Natural Area and Nature Center. access date:5/22/2010". Archived from the original on 2012-09-20. Retrieved 2010-05-24.