Kuarter: Perbedaan antara revisi

[[Iklim]]nya merupakan salah satu glasiasi periodik dengan [[gletser]] benua yang bergerak sejauh 40 derajat lintang dari kutub. Terjadi kepunahan besar mamalia besar di daerah Utara pada akhir Zaman [[Pleistosen]]. Banyak bentuk seperti [[kucing bergigi tajam]], [[mamut]], [[mastodon]], [[glyptodont]], dll., punah di seluruh dunia. Yang lainnya, termasuk [[kuda]], [[unta]], dan [[cheetah]] Amerika punah di [[Amerika Utara]].<ref>{{Cite web|url =http://www.unr.edu/cla/anthro/people/faculty/haynes/download%20Haynes+StanfordCamelops.pdf|title =Stanford Camelops|last =Haynes|url-status =dead|archive-url =https://web.archive.org/web/20140309104319/http://www.unr.edu/cla/anthro/people/faculty/haynes/download%20Haynes+StanfordCamelops.pdf|archive-date =9 March 2014}}</ref><ref>{{Cite web|title = Extinct American Cheetah Fact Sheet|url = http://library.sandiegozoo.org/factsheets/_extinct/cheetah1_american/cheetah1_american.html|website = library.sandiegozoo.org|access-date = 10 December 2015|archive-url = https://web.archive.org/web/20160304023142/http://library.sandiegozoo.org/factsheets/_extinct/cheetah1_american/cheetah1_american.html|archive-date = 4 March 2016|url-status = dead}}</ref>