*190,000,000 years ago witnessed a westward extension of the [http://en.wikipedia.org/wiki/Western_Cordillera_(North_America)#Geologic_origin North American Carboniferous sea over the present Rocky Mountain] region, with an outlet to the Pacific Ocean through northern California. Coal continued to be laid down throughout the Americas and Europe, layer upon layer, as the coastlands rose and fell during these ages of seashore oscillations. ([[59:5|59:5.19]]) | *190,000,000 years ago witnessed a westward extension of the [http://en.wikipedia.org/wiki/Western_Cordillera_(North_America)#Geologic_origin North American Carboniferous sea over the present Rocky Mountain] region, with an outlet to the Pacific Ocean through northern California. Coal continued to be laid down throughout the Americas and Europe, layer upon layer, as the coastlands rose and fell during these ages of seashore oscillations. ([[59:5|59:5.19]]) |