Simplify the following text for a Grade 8 native English-speaking person.
Original: The Hekla 3 eruption approximately coincides with this period and , while the exact date is under considerable dispute , has been specifically dated to 1159 BCE by Egyptologists .
Simplified: The Hekla 3 eruption was about this time , and is dated at 1159 BC by Egyptologists and British archeologists .