When glacier ice melts, penguins and diatoms move in to the open water, leaving a signature for dating the movement of the glacier away from that area.
(When glacier ice melts, penguins and diatoms; move; in; to the open water) (When glacier ice melts, penguins and diatoms; leaving; a signature for dating the movement of the glacier away from that area)
When glacier ice melts, penguins and diatoms When glacier ice melts, penguins and diatoms
move leaving
in to the open water
a signature for dating the movement of the glacier away from that area