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26.04.2008 (21:54) Естественные науки >> Геология
Сьерра-Невада достигла своих вершин раньше, чем предполагалось
Исследуя залежи вулканического стекла на западе США, ученые обнаружили, что центральная часть хребта Сьерра-Невада достигла своей настоящей высоты 12 миллионов лет назад, приблизительно на 8-9 миллионов лет раньше, чем было общеизвестно. Это открытие имеет большое значение не только для понимания геологической истории горного кряжа, но и для моделирования древнего глобального климата. "Все модели глобального климата, которые используются в настоящее время, опираются на знание топографии ...>>


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