Flora and fauna

Geography

Australia was created by the juction of three early pieces of continental crust (cratons).

The oldest rocks in the ACT date from the Ordovician around 480 Million Years Ago. During this period the region along with most of Eastern Australia was part of the ocean floor; formations from this period include the Black Mountain Sandstone formation and the Pittman Formation consisting largely of Quartz-rich sandstone, siltstone and shale.[1] The Ordovician period is the second of the six (seven in North America) periods of the Paleozoic era. ...

The Yarralumla Formation is a mudstone/siltstone formation that was formed around 425 million years ago during the Silurian Period. The formation extends from Red Hill and Woden in the South to Yarralumla and Lake Burley Griffin in the north. The formation is evidence of the last major marine sedimentary period when eastern Australia was still covered by shallow seas. It shows fossil evidence of trilobites, coral and primitive crinoids. The Yarralumla brickworks quarry and the Deakin anticline are places where the formation is exposed and easily studied.[2] Mudstone is a fine-grained sedimentary rock whose original constituents were clays or muds. ... Categories: Stub | Sedimentary rocks ... In astronomy, geology, and paleontology, mya is an acronym for million years ago and is used as a unit of time to denote length of time before the present. ... Alternate use: The Silurians, a reptilian race from the science fiction series Doctor Who. The Silurian is a major division of the geologic timescale that extends from the end of the Ordovician period, about 439 million years before the present (BP), to the beginning of the Devonian period, about 408. ... Categories: Suburbs of Canberra (incomplete) | Suburbs of Canberra ... Woden Plaza entrance Woden Town Park Woden Town Centre, town centre in the district of Woden in Canberra, Australia. ... Yarralumla locality map Yarralumla (postcode: 2600) is a suburb in the inner south of Canberra, the capital city of Australia. ... Sunset over Lake Burley Griffin, viewed from the Commonwealth Bridge Lake Burley Griffin is a lake in the centre of Canberra, Australias federal capital city. ... Orders Agnostida Redlichiida Corynexochida Lichida Phacopida Proetida Asaphida Harpetida Ptychopariida doubtful order Nektaspida Trilobites are extinct arthropods in the class Trilobita. ... // Headline text Headline text Headline text Headline text Bold text Orders Scleractinia Corals are gastrovascular marine cnidarians (phylum Cnidaria; class Anthozoa) existing as small sea anemone-like polyps, typically forming colonies of many individuals. ... Orders Articulata Cladida (extinct) Flexibilia (extinct) Camerada (extinct) Disparida (extinct) Crinoids, also known as sea lilies or feather-stars, are marine animals that make up the class Crinoidea of the echinoderms (phylum Echinodermata). ... Deakin locality map Deakin (postcode: 2600) is a suburb of Canberra, Australian Capital Territory, Australia. ...

In the 1840s fossils of brachiopods and trilobites from the Silurian period where discovered at Woolshed Creek near Duntroon. At the time these where the oldest fossils discovered in Australia, though this record has now been far surpassed. [3] Other specific geological places of interest include the State Circle cutting and the Deakin anitcline.[4][5] [6]. A fossil Ammonite Fossils are the mineralized remains of animals or plants or other traces such as footprints. ... Subphyla and classes See Classification Brachiopods (from Latin bracchium, arm + New Latin -poda, foot) make up one of the major animal phyla, Brachiopoda. ... Orders Agnostida Redlichiida Corynexochida Lichida Phacopida Proetida Asaphida Harpetida Ptychopariida doubtful order Nektaspida Trilobites are extinct arthropods in the class Trilobita. ... The Silurian is a major division of the geologic timescale that extends from the end of the Ordovician period, about 443. ... Robert Campbells property Duntroon was situated on the limestone plains of New South Wales in the area that is now covered by the Australian Capital Territory. ...

These formations became exposed when the ocean floor was raised by a major volcanic activity in the Devonian forming much of the East coast of Australia. Orogeny is the process of mountain building, and as such is both a tectonic structural event, a geographical event and a chronological event, in that orogenic events happen within a time frame, affect certain regions of rocks and crust, and cause distinctive structural phenomena and related tectonic activity. ... Disambiguation: Devonian is also an adjective relating to the English county of Devon or the people there. ...