They called the area Baramada or Burramatta ('Parramatta') which means "head of waters", To this day many eels and other sea creatures are attracted to nutrients that are concentrated where the saltwater of Port Jackson meets the freshwater of the Parramatta River.
The Parramatta Eels Rugby League club chose their symbol as a result of this phenomenon.
In 1791 he changed the name to Parramatta, approximating the term used by the local Aboriginal people.
A neighbouring suburb acquired the name "Rose Hill", which today is spelt "Rosehill".
However, no plausible explanation has been offered for the source of the radiation until now.Summer maximum temperatures are quite variable, often reaching above 35 °C (95 °F), on average 8.1 days in summer, and sometimes remaining in the low 20's, especially after a cold front or a sea breeze, such as the southerly buster.Northwesterlies can occasionally bring hot winds from the desert that can raise temperatures higher than 40 °C (104 °F) mostly from November to February.On Sunday 2 November 1788, Governor Phillip took a detachment of marines along with a surveyor and, in boats, made his way upriver to a location that he called The Crescent, a defensible hill curved round a river bend, now in Parramatta Park.As a settlement developed, Governor Phillip gave it the name "Rose Hill" after George Rose, Secretary for the British Treasury.An Italian team at the Politecnico di Torino, a well respected Italian University, claims the powerful magnitude 8.2 earthquake, which occurred in Old Jerusalem in the year 33 AD, would have been strong enough to release neutron particles from crushed rock.