glaciation phase that lasts approximately 90,000 years and a deglaciation phase that lasts approximately 10,000 years.
(glaciation phase; lasts; approximately 90,000 years and a deglaciation phase) (a deglaciation phase; lasts; approximately 10,000 years)
glaciation phase a deglaciation phase
lasts lasts
approximately 90,000 years and a deglaciation phase
approximately 10,000 years