The ice cap, now directly on the equator and fully exposed to the blazing heat of the sun, will begin to melt at once and, while it may have taken thousands of years to reach its present enormous size, it may take only brief decades for the total thaw to occur.
(it; may take; only brief decades; for the total thaw to occur) (the total thaw; to occur; ) (it; may have taken; thousands of years; to reach its present enormous size) Context(it may have taken,List([129, 146))):(it; may have taken thousands of years to reach; its present enormous size)
it may have taken,List([129, 146))
it the total thaw it it
may take to occur may have taken may have taken thousands of years to reach
only brief decades for the total thaw to occur
thousands of years to reach its present enormous size
its present enormous size