Dinosaur Cove
| Dinosaur Cove | |
|---|---|
Victoria | |
| Coordinates | 38°46′48″S 143°24′18″E / 38.78000°S 143.40500°E[1] |
| Type | Bay |
| Basin countries | Australia |
The Dinosaur Cove in
Otway Ranges meet the sea to the west of Cape Otway, adjacent to Great Otway National Park (map).[2] The inaccessible ocean-front cliffs include fossil-bearing strata of the Eumeralla Formation that date back to about 106 million years ago and has provided discoveries important in the research of the natural history of dinosaurs
in Australia and the Southern Hemisphere as a whole.
Geological time-line
During the Early
flood plain within a great rift valley that formed as Australia started to separate northward from Antarctica. Sand, mud and silt deposits covered and sometimes preserved the remains of dead animals and plants. As the rift valley sank, the deposits were overlaid by sediment, which turned to rock under pressure. In the last 30 million years the sediments have been uplifted to form the Otway Ranges and Strzelecki Ranges
, bringing them near the surface again.
The richest find of petrified dinosaur bones is confined to narrow thin (up to 0.3 m) layers, most likely ancient stream beds serving as repositories of the bones of smaller animals.
History of discovery
In 1903, geologist
Patricia Rich. The dinosaur taxa, Leaellynasaura amicagraphica and Timimus hermani, are named for the children of the Riches', Tim and Leaellyn. Heavy mining equipment and dynamite was used to blast away overlying strata to uncover the fossiliferous rock layers in the cliff face.[3]
Over geological time since, the rock was pushed so deep that heat and pressure hardened it much, before it came again to the surface. As a result, a common way to look for fossils in it was to break each lump with a sledgehammer, and after each blow to examine all new broken surfaces for cross-sections of bone. Any pieces that showed bone were sent to the laboratory to extract the bone by careful preparation.
_at_Dinosaur_Cove_Australia,_c1995.jpg)
In the 1980s and 90s Dinosaur Cove yielded
polar dinosaurs of Australia", has been interpreted as showing possible adaptations to vision in low light conditions and possibly were warm-blooded; this has been suggested as an explanation for how some of these dinosaurs foraged for food during the polar winter months. It is worth noting that although these dinosaurs lived at polar latitudes, the Cretaceous climate was significantly milder than today, so temperatures within the Antarctic and Arctic Circles were vastly different from the climate at these latitudes today, because the lopsided arrangements of the continents made sea currents and monsoon
winds blow across the polar areas and not around them, and so stopped cold pools from developing around the poles.
See also
References
 | This article needs additional citations for verification. (January 2010) |
- ^ "Dinosaur Cove (VIC)". Gazetteer of Australia online. Geoscience Australia, Australian Government.
- ^ "Dinosaur Cove", Victorian Resources Online, Department of Primary Industries, 31 December 2009, archived from the original on 4 April 2011, retrieved 2011-02-21
- ^ Museum Victoria. Retrieved 13 December 2017.
