There was a major ice sheet called Cordilleran Ice Sheet.
4T or 4-T may refer to  :. 4-T-TRIS ; see Thiotrisescaline. Thiotrisescaline. Thiotrisescaline. 4-t-butylpyrocatechol ; see 4-tert-Butylcatechol. 4T-MMDA-2 ; see MMDA. MMDA. MMDA ( drug ). 4T-GTE , a model of Toyota T engine. Toyota T engine. Toyota T engine. 4T , a model of LWD Szpak. LWD Szpak. LWD Szpak. Piaggio Zip 4T , an urban scooter. Piaggio Zip 4T. Piaggio Zip. 4T -- Vietnam Youth Education Support Center