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Геология


геоложката ерафлоратафаунатаклиматичнитеЗемятаепохи












Период (геология)




от Уикипедия, свободната енциклопедия






Направо към навигацията
Направо към търсенето







































































Еон

Ера
Продължителност

Период
Начало
в млн. г.

Фанерозой

Неозой
65,5 млн. г.

Кватернер
2,588  

Неоген
23,03  

Палеоген
65,5  

Мезозой
185,5 млн. г.

Креда
145,5  

Юра
199,6  

Триас
251    

Палеозой
291 млн. г.

Перм
299    

Карбон
359,2  

Девон
416    

Силур
443,7  

Ордовик
488,3  

Камбрий
542    

Протерозой

Неопротерозой
458 млн. г.

Едиакарий
630    

Криоген
850    

Тоний
1 000    

Мезопротерозой
600 млн. г.

Стений
1 200    

Ектасий
1 400    

Калимий
1 600    

Палеопротерозой
900 млн. г.

Статерий
1 800    

Орозирий
2 050    

Рясий
2 300    

Сидерий
2 500    

Архай

Неоархай
300 млн. г.
2 800    

Мезоархай
400 млн. г.
3 200    

Палеоархай
400 млн. г.
3 600    

Еоархай
3 800    

Хадей
  4 700    

Геоложкият период е едно от няколкото подразделения на геоложкото време, подинтервал на геоложката ера. Продължителността му варира от 50 до 200 милиона години. Често периодите отразяват основните промени във флората и фауната както и промените в климатичните и геоложки условия.


Геолозите са разделили историята на Земята на няколко периода. Всеки период може да се раздели на отделни епохи. Скалите, образувани по време на даден период, принадлежат към стратиграфска единица, наречена система.





Общомедия разполага с мултимедийно съдържание за

Период (геология).











Взето от „https://bg.wikipedia.org/w/index.php?title=Период_(геология)&oldid=8188253“.










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