AFTER spending weeks at a fossil dig site near Nebo, scientists from Queensland Museum and BHP will be in Mackay to show off their finds.

The free community day will be at the MECC Sunday.

The event aims to engage the community on preserving Queensland's rich environmental heritage and to showcase recent discoveries made by Queensland Museum palaeontologists during their annual palaeontological fossil dig at South Walker Creek.

The South Walker Creek site was once a stomping ground for megafauna - an extinct, supersized species of mammals, reptiles and marsupials. It is located about 40km west of Nebo and operated by the BHP Mitsui Coal (BMC) joint venture.

Queensland Museum Network acting CEO Alexander Hayward said the community day was a great way to get inspired by science and meet the scientists who helped bring our rich history to life.

"Our palaeontologists have made some incredible scientific discoveries in this region and I encourage everyone to come along and discover what life was like in Queensland thousands of years ago when giant kangaroos, crocodiles and oversized wombats roamed the lands,” Mr Hayward said.

"Queensland Museum and BHP will have their top palaeontologists and geologists on hand to talk about STEM careers and for the smaller scientists fun dinosaur-themed performances with Professor Flint, so something for all ages.”

Ben Clarke, general manager of South Walker Creek Mine said BMC was excited to bring together some of Australia's leading STEM experts and the local community to highlight the research happening in the region.

"We are very proud to continue working the Queensland Museum on these exciting research outcomes,” Mr Clarke said.

Queensland Museum palaeontologist, Dr Scott Hocknull, who has been leading the South Walker Creek expedition with a team of staff and volunteers including geologists from BHP, will be one of the key speakers at the community day.

"All of the sites under study by Queensland Museum palaeontologists form part of the ancient story of the Fitzroy River catchment, one of the largest river systems in Australia and home to numerous endangered and vulnerable species and habitats,” Dr Hocknull said.

"Understanding how this major river system has changed these species over millennia is an important research agenda for palaeontologists.

"The South Walker Creek fossils share the Fitzroy River catchment with the fossils from Mt. Etna and Capricorn Caves. It's a unique opportunity to match these fossil records across a massive river system that has flowed for millions of years.”

The free community day at the MECC tomorrowis one of the events being held as part of National Science Week.

The display will be open from 10am-4pm.