Geyzer chist?

Geyzer – chashmai garm, ki zeri fishor doiman favvorahoi obi garm va bugro ba sathi zamin partob mekunad. Geyzerho yake az zuhuroti marhilai okhiri vulqonizm ba shumor rafta, dar mintaqauoi faoliyati muosiri vulqoni pahn gardidaand (rasm. 41, 42).

Geyzerho dar navohii muosir yo nachandon peshi vulqonizm vomekhurand. Dar yak otashfishoni geyzer metavonad to 1000 litr obro ba masofai 40 metr par­tob qunad. Faoliyati geyzer az marhilai oromishi ,mavsimi, purshavii chohbun
bo ob, favvorakunii moei obibugi va partobi boshiddati but, ki tadrijan ba partobi oromtar mubaddal megardad, qati partobi but va bozgasht ba marhilai oromish tashkil meyobad.

Dar Kamchatka ziyoda az 100 geyzer vomekhurand, dar Islandi nazdiki 30 gey­zer, dar YAponiya, Zelandiyai Nav, CHin va IMA to 200 geyzer vujud dorand. Az hama geyzeri maruf Old-Faytfuld dar bogi millii Yellouston (IMA) ba shu- mor meravad. Dar injo geyzeri az hama buzurg voqe gardidaast, ki har 53-70 daqiqa obro ba masofai 42 metr partob mekunad. Geyzerho baroi ba dast vardani obi garm va nerui barq metavonand mavridi istifoda qaror doda shavand.

Savol va suporishho

1. Harakati qishri Zamin chist? Va ba kadom navho taqismbandi megardad?
2. YAkchand vulqoni marufro nombar kuned va onhoro dar kharita nishon dihed.
3. Paydoishi zaminlarza va vulqonhoro sharh dihed.
4. CHashmahoi garm va geyzerho chistand? Naqshi onhoro dar faoliyati khojagidorii inson va ahamiyatashonro baroi salomatii insonho sharh dihed.