Реголит

Повърхността на Деймос (спътник на Марс) е покрита със слой реголит, за който се предполага, че е с дебелина от 50 m.

Реголит е слой от рехав хетерогенен материал, покриващ твърди скали. Реголит има на Земята, Луната, други планети и някои астероиди. На Земята реголитът се е образувал вследствие на ерозия и биологични процеси и е съставен главно от седиментни скали. На небесни тела без атмосфера реголитът се образува от гравитационното натрупване на отломки, които се получават вследствие на сблъсъци с други обекти.

Наличието на реголит на Земята е една от главните причини за съществуването на живот, тъй като малко растения могат да живеят върху гола скала, а животните не биха могли да се заровят или да си направят убежище без свободен материал.

На Луната реголитът се е формирал под действието на микро-метеорити, които са разрушили повърхностните скали на прах. Този прах е по-светлоотразителен от базалта, от който са образувани лунните морета и затова изглежда по-светъл, гледан от Земята. Преди кацането на тежки апарати на повърхността на Луната (като Аполо 11) е имало съмнения, че реголитът може да се окаже прекалено рехав и да поддаде под тежестта на лунния модул и че модулът ще потъне под повърхността.

Външни препратки

  • C Meyer. Lunar Breccia (PDF) // NASA Lunar Petrographic Educational Thin Section Set. НАСА, 2003. Посетен на 22 декември 2006. (на английски)

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