Complex sentence: The AGGDB is a Mode 2 glacio-geological database for the Antarctic ice-sheet using information from around 150 published sources, covering glacial activity mainly from the past 30000 years is available online, and aims to be comprehensive to the end of 2007.
Split into simpler sentences: The AGGDB is a Mode 2 glacio-geological database for the Antarctic ice-sheet using information from around 150 published sources, covering glacial activity mainly from the past 30000 years. It is available online, and aims to be comprehensive to the end of 2007.