Close message Scootle will stop supporting resources that use the Adobe Flash plug-in from 18 Dec 2020. Learning paths that include these resources will have alerts to notify teachers and students that one or more of the resources will be unavailable. Click here for more info.

Image Dinosaur fossil bone

P 208014 | Sharing Exchange Learning Resource R6897

This is a colour photograph of a fossil bone set against a black background. This bone is an opalised fossil of a femur, or thigh bone, of a hypsilophodont dinosaur. The blue colouration of this opalised fossil bone is clearly visible.



Educational details

Educational value
  • This opalised bone is a dinosaur femur, or thigh bone, found on the opal fields of Lightning Ridge in New South Wales. It is estimated to be 106 million years old. Opalised dinosaur bones are found only in Australia and most come from Lightning Ridge, where they occur in marine and freshwater sediments of the Cretaceous Period (141-65 million years ago). All opalised dinosaur fossils, including this one, are single bones, not part of a skeleton.
  • An opalised fossil bone is a special type of replacement fossil that is formed when the original remains are completely dissolved or destroyed and are later replaced by new materials. Opalisation occurs when the bone dissolves away, a silica-rich gel fills the resulting hole, and an opalised cast fossil is created.
  • Fossils are the remains, moulds or traces of dead plants or animals preserved in rock, mostly sedimentary rock such as sandstones, siltstones, shales and limestones. Fossils provide invaluable information about the Earth's past, including the evolution of plants and animals, the age and formation of rocks, previous climatic and environmental conditions, and the former positions of the continents.
  • This fossil bone is the femur of a hypsilophodont dinosaur, a fast and agile herbivore that lived on every continent during the Cretaceous Period. Hypsilophodons were small, about 2 m long, 0.6 m tall and weighed about 68 kg. They stood on their long hind legs, which were about twice as long as their front legs, and had a long stiff tail for balance while running quickly. They had small heads with strong beak-like jaws, 28-30 cheek teeth and cheek pouches for storing food while chewing.
  • Australian dinosaur bones are rare because of Australia's largely open landscape where exposed fossils are often destroyed by weathering. Most of Australia's dinosaur bones come from north-central Queensland in rocks about 140 million years old. Bones of dinosaurs including theropods, protoceratopsians, ankylosaurs, 'Muttaburrasaurus' and hypsilophodons have been found. Fossil dinosaur trackways and footprints are much more common than bone fossils in Australia.
Year level

4; 5; 6; 7; 8; 9; 10; 11; 12

Learning area
  • science
Strand
  • Science/Science understanding

    Other details

    Contributors
    • Content provider
    • Copyright holder
    • Organisation: Museum of Victoria
    • Address: Carlton VIC 3053 Australia
    • Remarks: Reproduced courtesy of Museum Victoria
    • Publisher
    • Date of contribution: 05 Sep 2013
    • Organisation: Education Services Australia
    • Address: Melbourne VIC 3000 Australia
    • URL: http://www.esa.edu.au/
    • Author
    • Name: John Broomfield
    • Remarks: photographer
    Access profile
    • Colour independence
    • Device independence
    • Hearing independence
    Learning resource type
    • Image
    Browsers
    • Microsoft Internet Explorer - minimum version: 8.0 (MS-Windows) - maximum version: 9.0 (MS-Windows)
    • Firefox - minimum version: (MS-Windows)
    • Safari - minimum version: 5.1 (MacOS)
    Operating systems
    • MacOS - minimum version: 10.6
    • MS-Windows - minimum version: XP - maximum version: 7
    Rights
    • © Education Services Australia Ltd and Museum Victoria, 2016, except where indicated under Acknowledgments