Предмет: История, автор: zazazazazaza880

как образовался каменный уголь. ПОМОГИТЕ ПОЖАЛУЙСТА!

Ответы

Автор ответа: sunand

Задолго 《здесь》 росли папоротники. После образовался каменный уголь.

Автор ответа: TopGearok

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Автор ответа: VeronikaAbramenko

Каменный уголь появился на Земле около 300—350 млн лет назад, когда на первобытных болотах пышно росли древовидные папоротники и начали появляться первые голосеменные растения. Огромные стволы падали в воду, постепенно образуя толстые слои неразложившейся органической массы. Древесина при ограниченном доступе кислорода не гнила, а постепенно погружалась под своим весом все глубже. Со временем, благодаря смещению пластов земной коры, эти слои опустились на значительную глубину и там, под воздействием большого давления и повышенной температуры, произошло качественное изменение дерева в уголь.

Автор ответа: TopGearok

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Автор ответа: zazazazazaza880

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