Over the past century geologists have learned that the space that became Douglas Lake began as a large, long-lasting chunk of ice, broken from the terminal end of a melting, brittle glacier, leaving a pit (kettle) in the gravel, and that what is now firefly shoreline has been developing in wind and waves and a changing water level for 9500 years.
(the past century geologists; have learned; that the space that became Douglas Lake began as a large, long-lasting chunk of ice, broken from the terminal end of a melting, brittle glacier, leaving a pit (kettle) in the gravel, and that what is now firefly shoreline has been developing in wind and waves and a changing water level for 9500 years; T:Over) Context(the past century geologists have learned,List([5, 45))):(the space that became Douglas Lake; began; as a large, long-lasting chunk of ice) (the space; became; Douglas Lake) (firefly shoreline; has been developing; L:in wind and waves) (a large, long-lasting chunk of ice; broken; from the terminal end of a melting, brittle glacier) (the space that became Douglas Lake; leaving; a pit; L:in the gravel)
the past century geologists have learned,List([5, 45))
the past century geologists the space that became Douglas Lake the space firefly shoreline a large, long-lasting chunk of ice the space that became Douglas Lake
have learned began became has been developing broken leaving
that the space that became Douglas Lake began as a large, long-lasting chunk of ice, broken from the terminal end of a melting, brittle glacier, leaving a pit (kettle) in the gravel, and that what is now firefly shoreline has been developing in wind and waves and a changing water level for 9500 years T:Over
as a large, long-lasting chunk of ice
Douglas Lake
L:in wind and waves
from the terminal end of a melting, brittle glacier
a pit L:in the gravel