Online Encyclopedia

Search over 40,000 articles from the original, classic Encyclopedia Britannica, 11th Edition.

TASMANIA

Online Encyclopedia
Originally appearing in Volume V26, Page 443 of the 1911 Encyclopedia Britannica.
Spread the word: del.icio.us del.icio.us it!

TASMANIA  , a See also:

British colonial See also:state, forming See also:part of the Australian See also:Commonwealth . It is composed of the See also:island of Tasmania and its adjoining islands, and is separated from the Australian See also:continent on the See also:south-See also:east by See also:Bass Strait . The See also:Sea See also:Elephant See also:Rook .See also:King's I . Bold Pt . emoty Welker ,C . island of Tasmania is triangular in shape, See also:area 24,331 sq. m . (with the other islands 26,215 sq. m.), 20o m. from N. to S., and 245 M. See also:flour E. to W . Coastal Features.—The See also:southern portion of the eastern See also:shore of Tasmania is remarkable for its picturesque inlets and bold headlands . The See also:principal inlet is See also:Storm See also:Bay, which has three well-defined arms . The most easterly is See also:Norfolk Bay, enclosed between Forestier's See also:Peninsula and See also:Tasman Peninsula . The See also:middle See also:arm is See also:Frederick See also:Henry Bay, and the western the See also:estuary of the See also:Derwent . It is on this estuary that See also:Hobart, the See also:capital of the island, is situated .

Besides the See also:

main entrance to Storm Bay, between Cape Raoul and Tasman See also:Head, there is D'See also:Entrecasteaux Channel, which divides See also:North and South See also:Bruni Island from the mainland . This channel has two branches, the easterly forming the entrance into Storm Bay, and the western being the estuary of the Huon See also:river . On the east See also:coast lies the peculiarly-shaped Maria Island, almost severed by deep indentations on the east and See also:west . Above this island is See also:Oyster Bay, formed by the See also:projection, See also:Freycinet Peninsula . On the south are some very prominent headlands . In the south-west lies the See also:fine See also:harbour of See also:Port Davey, which receives several small See also:rivers . Proceeding northward along the west coast the most conspicuous headlands are Rocky Point, Point Ilibbs and Cape Sorell, which stands at the entrance of See also:Macquarie Harbour, the deep inlet receiving the See also:waters of the river See also:Gordon C Wiohham xent'Craup See also:frith 4, Judgement Rim . .See also:Wright Poch B a a s S t r a i t Craggy le 4istare Pipamid . C.Franh/and Pascoe /s..: See also:Marshall See also:Hummock See also:Low Manngege r ./.Vt See also:Group `-- . ` Chappellele., Vanai [See also:tart I . G.wse / BadgerL40 . CaPe ` w e H Cq Clarhe I. lO~r ssager o l.n °o aPS~ °v-t ~tlnha Strait PGLP t e obi o~.o i °~,oe^,v '!° .

. °See also:

Swan 1 . C.Natura/isle ws^~Oec~o~~q\ 0'9~r _r_ . I TJ86a'` , ddustone See also:Lodi Swan Port 4. rouruille s Panynsu/o mp 5?Sohouten l . 1;9'Toillefen4s, - labdna . . See also:Mario I . Riedle B . See also:Mar/on Bay .Fred' Rendrich Forestieri Peninsula raeman Peninsula and several smaller streams . North of this there are several prominent headlands . The west coast terminates at Cape Grim, opposite which are the group known by the name of See also:Hunter's Islands . Going eastward along the north coast Circular Head is met with, a narrow peninsula See also:running out for six See also:miles and terminating in a rocky See also:bluff 400 ft. high . Further east are Emu Bay, Port Frederick, Port Sorell and Port Dalrymple, into which flows the Tamar river, on which See also:Launceston is situated . In Bass Strait are several large islands belonging to Tasmania; King's, See also:Flinders, Cape Barren and See also:Clarke Islands are the largest .

Flinders Island has an area 1 to the subsidence of the See also:

land, of which the islands in the Bass Strait of 513,000 acres . Among the rivers flowing northward to Bass are remnants, which then connected Tasmania with the continent . The latest date for the existence of this connexion is given by the See also:absence from Tasmania of the See also:dingo, the See also:lyre-See also:bird and the See also:giant marsupials; so that the See also:isolation of Tasmania was earlier than the arrival of those animals in south-eastern See also:Australia . That it was not much earlier is shown by the fact that some still living See also:species of mammals, such as the thylacine, existed before the separation . The See also:geological sequence in Tasmania is full, and the island contains a better See also:series of Carboniferous rocks than is found in See also:Victoria . The See also:nucleus of the island is a See also:block of Archean rocks, which are not, so far as is known, extensively exposed . The most certain representatives of the Archean are the See also:gneiss and See also:schists of the See also:Dove river and the upper Forth, and the See also:hornblende-schists, which are exposed in the river valleys on the margins of the central See also:plateau . The See also:Mount See also:Lyell schists which underlie the West Coast Range, and the quartzites of Port Davey on the western coast, ,have also been regarded as Archean . The See also:Lower Palaeozoic systems begin with the See also:Cambrian, which are found in See also:northern Tasmania near See also:Latrobe, and contain Cambrian fossils as Dikelocephalus Tasmanicus and Conocephalites stephensi . The Ordovician See also:system has not been certainly identified; but probably many of the slates and quartzites ! in north-western Tasmania and of the See also:mining See also:field of See also:Beaconsfield on the estuary of the Tamar, are Ordovician . The See also:Silurian system, however, is well See also:developed in north-western Tasmania, and is represented by slates, limestones and sandstones yielding a distinctively Silurian See also:fauna . The rocks are best known by the See also:lime-stones in the See also:lead mining field at See also:Zeehan, and the slates, including the See also:tin mine of Mount Bischoff .

The Devonian system is best represented by the massive conglomerates and quartzites, which See also:

form the West Coast Range extending from Mount Lyell on Macquarie Harbour, through Mounts See also:Jukes, See also:Owen, Lyell, See also:Murchison and See also:Geikie, to Mount See also:Black . These mountains consist of detached remnants of a See also:sheet of See also:quartz conglomerates, interbedded with sandstones, containing crinoid stems and obscure brachiopods . They See also:rest unconformably on the Silurian rocks on the King river and to the west are faulted against the schists by a powerful overthrust See also:fault, traversing the Mount Lyell See also:copper field . A northern See also:extension of these conglomerates forms the See also:Dial Range near Burnie . The Devonian See also:period, as in Victoria, was marked by a series of granitic intrusions, which altered the older beds on the contact, while the quartz-See also:porphyry dikes, which are intrusive in the Silurian rocks at the Mount Bischoff tin mine, doubtless belong to this period . The Carboniferous system begins with a series of marine limestones, shales and grits, including a See also:rich Lower Carboniferous fauna . The Carboniferous rocks occupy the whole of the south-eastern corner of Tasmania; and one outlier occurs on the northern coast in the See also:Mersey Valley . This formation See also:helps to build up the central plateau, and a See also:band outcrops around its edge . The Upper Carboniferous includes beds of shale and See also:coal; but though the coal is See also:good, the seams are thin and have not been much worked . The Coal See also:Measures are covered by marine shales with numerous bryozoa; and, on the See also:horizon of the Greta Coal Measures of New South See also:Wales, is a See also:bed of Carboniferous glacial deposits . The Mesozoic system is not well developed . It is usually regarded as beginning with a fresh-See also:water series containing the remains of See also:fish and labyrinthodonts; but as it also contains Vertebraria it is probably Palaeozoic; and this series is covered by sandstones and shales which are probably of Triassic See also:age .

The most conspicuous member of the Mesozoic group is the sheet of See also:

diabase and See also:dolerite, made up of laccolites and sills, which covers most of the central plateau of Tasmania . These rocks form the prominent scarps, known as the Tiers, on the edge of the plateau, and its outliers, such at Mount See also:Wellington near Hobart, and the See also:Eldon Range . This sheet of diabase has been regarded as Carboniferous; but, according to W . H . Twelvetrees, it is probably Cretaceous . The See also:Cainozoic system includes at Table Cape an outcrop of marine beds probably of Oligocene age . Lower Cainozoic lacustrine beds with fossil See also:plants. of the same age as those which underlie the older basalts of Victoria, occur in the valleys of northern Tasmania . The Cainozoic series includes many igneous rocks . The tinguaites and sfilvsbergites of Port Cygnet, south of Hobart, may be of this age; they are intrusive in Carboniferous rocks, and there is no See also:evidence of their precise date; but their resemblance to the rocks associated with the geburite-See also:dacite of Victoria suggests that they may belong to the beginning of the Cainozoic volcanic period of south-eastern Australia . North-western Tasmania in See also:Pleistocene times had an of See also:Ross-See also:shire and See also:Inverness-shire in See also:Scotland, from the picturesque See also:character of the See also:blue, See also:white, and pinkish crystalline peaks and the fantastic outlines of the See also:mountain ranges which rise abruptly to a height of from 2000 to nearly 3000 feet above the See also:Button Grass Plains . (T . A .

C.) See also:

Geology.—Tasmania is, geologically, an outlier of the Australian continent . It is most intimately connected with Victoria, from which it was only separated by the foundering of Bass's Strait in See also:late See also:Pliocene or See also:early Pleistocene times . The precise date of the separation is fixed as later than the See also:Miocene, since the fringe of the marine Miocene deposits along the southern coast of Victoria is broken, from Flinders to Alberton; and this See also:gap was no doubt due Strait are the Tamar, See also:Inglis, See also:Cam, Emu, See also:Blyth, Forth, See also:Don, Mersey, See also:Piper and Ringarooma . The Macquarie, receiving the See also:Elizabeth and See also:Lake, falls into the South Esk, which unites with the North Esk to form the Tamar at Launceston . Westward, falling into the ocean, are the Hellyer, See also:Arthur and Pieman . The King and Gordon gain Macquarie Harbour; the Davey and See also:Spring, Port Davey . The central and southern districts are drained by the Derwent from Lake St Clair—its tributaries being the Nive, See also:Dee, See also:Clyde, See also:Ouse and See also:Jordan . The Huon falls into D'Entrecasteaux Channel . The main See also:axis of the See also:Great See also:Cordillera--so termed originally by See also:Sir See also:Roderick Murchison—bordering the eastern coast-See also:line of Australia, may be traced across Bass Strait in the See also:chain of islands forming the See also:Furneaux and See also:Kent group, which almost continually See also:link Tasmania with See also:Wilson's Promontory, the nearest and most southerly part of the Australian mainland . Tasmania is wholly occupied by the ramifications of this chain, and in itself may be said to embrace one and all of its characteristic features . Taking a stand near Lake Fergus, to the east of Lake St Clair, the observer will find himself nearly in the centre of an extensive plateau, with an See also:elevation, especially on the northern See also:side, of between three and five thousand feet above the sea-level . This elevated plateau extends from Dry's Bluff in the north to the See also:Denison Range in the south-west, and although often receding at points adjacent to the See also:sources of the principal rivers, invariably presents a bold crested front to the north, west and east .

At its greatest elevation it is comparatively level, and contains many extensive See also:

freshwater basins, such as Lake See also:Augusta, Lake St Clair, Lake Sorell, Lake See also:Echo, Lake See also:Crescent, Arthur's Lake and the Great Lake . The marginal crests of this mountain tableland, together with its upper See also:surface, are known locally as " Tiers," and have a very commanding aspect in the neighbourhood of See also:Longford, See also:Westbury, Deloraine and Chudlcigh . The extent of the principal elevated plateau is best appreciated when we consider that it maintains its See also:general See also:altitude in a See also:westerly direction from Dry's Bluff (4257 feet) on the north to See also:Cradle Mountain (5069 feet) in the north-west, a distance of nearly 5o miles; from Dry's Bluff in a south-westerly direction to Denison Range, a distance of over 6o miles; and from Dry's Bluff to Table Mountain in a southerly direction, a distance of above 43 miles . This plateau itself again rests upon a more extended tableland, stretching westwards, and, with the See also:Middlesex Plains, the See also:Hampshire Hills and the Emu Plains, maintaining an altitude of 1200 to 2000 feet . Its limits follow the coast-line more or less closely, the space between it and the sea often broadening out into low-lying tracts not much raised above the sea-level . Here and there, rising abruptly from its surface, are to be seen isolated peaks, the most characteristic of which are See also:Valentine's See also:Peak (3637 feet) and Mount Pearse . Ridges and plateaus of a similar character, but more or less isolated, such as See also:Ben See also:Lomond (5010 feet) and Mount Wellington (4166 feet), are to be found in the north-east and south-west of the island . Towards the extreme west and south, anticlinal and synclinal ridges trend north and south, the most characteristic being the See also:Huxley, Owen, See also:Sedgwick, See also:Franklin and Arthur Ranges . See also:Settlement of See also:population has taken See also:place principally among the plains and lower levels of the north-western, midland and south-eastern parts of the island, following in the main the rocks of See also:Tertiary and Mesozoic age . In the See also:Recent Tertiary period the soils of these plains and valleys have been greatly enriched by extensive outbursts of See also:basalt with accompanying tuffs . These basalts produce a very rich See also:chocolate See also:soil, and were it not for their See also:influence, the greater part of what is now the most fertile part of the island would have been comparatively poor or altogether sterile . The See also:appearance of the island throughout is wonderfully beautiful, with its open plains, bordered by far-extending precipitous mountain tiers, its isolated shaggy peaks and wooded ranges, and its many See also:noble rivers and lakes .

Its coasts for the most part, especially towards the south, See also:

ate bold, and frequently indented with splendid bays and harbours, affording ample shelter and safe anchorage for See also:ships . On the western side onto is reminded of scenes in the See also:highlands extensive series of glaciers, of which the lower moraines were de-posited only about 400 feet above sea level . The See also:information as to the geology of Tasmania up to 1888 is collected in R . M . See also:Johnston's Systematic See also:Account of the Geology of Tasmania, which gives a bibliography up to that date . A later See also:sketch of the island is by W . H . Twelvetrees, " Outlines of the Geology of Tasmania," Proc . R . See also:Soc . Tasmania, 1900-1901, pp . 58-74 .

The mining literature is given in the reports of the Mines See also:

Department, and See also:special reports issued in the See also:Parliamentary Papers; and the economic and general geology are described in reports issued periodically by the Geological Survey, under W . H . Twelvetrees, and in papers published in the Proceedings of the Royal Society of Tasmania . The Mount Lyell mining field is described, with some account of the neighbouring districts of Western Tasmania, in J . W . See also:Gregory, The Mount Lyell Mining Field (See also:Melbourne, 1904) . The glacial geology, with a See also:summary of the literature thereon, is described by the same writer in the Quarterly See also:Journal of the Geological Society, 1904, vol . Ix., pp . 7-8, 37-53• (J . W . G.) See also:Climate.—Tasmania possesses a very temperate and healthy climate . The mean temperature of the See also:year, as estimated from observations extending back to 1841, is about 50.10° .

The mean at Hobart was 54'4°, at Launceston 56.6° and at Oatlands, which is in the centre of the island and 1400 ft. above sea-level, 51.76° . See also:

Snow is rarely seen except in the mountains . The See also:average temperature at Hobart of See also:January, the hottest See also:month, is 63°, and of See also:July, which is See also:mid-See also:winter, 45° . The western prevailing winds—particularly the north-western--carry the See also:rain-bearing clouds . The elevation-See also:divide between the western and eastern parts of the island rises generally to a height of between 3000 and 5000 ft., and consequently the parts to the east of such heights receive much less precipitation than those to the westward . The general average for the eastern See also:district over a period of years was 22.07 inches; for the western, 37.55 inches; and for Tasmania 26.69 inches . See also:Flora.—The vegetation which prevails among the older schistose rocks of the west and extreme south presents a totally different appearance to that which occurs in the more settled districts of the east . The western vegetation, as compared with that of the east, presents as marked a contrast as do the prevailing rocks upon which it flourishes . The characteristic trees and shrubs of the west include the following genera, viz.: Fagus, Cenarrhenes, Anodopetalum, Eucryphia, Bauera, Boronia, Agastachys, Richea, Telopea, Grevillea, Orites, Athrotaxis, Dacrydium, Phyllocladus . On the eastern side the plains and rocky ridges, where not artificially cleared, are occupied by shaggy and often sombre forests mainly composed of the following genera: See also:Eucalyptus (See also:gum See also:tree), See also:Casuarina, Bursaria, See also:Acacia, Leptospermum, Drimys, Melaleuca, Dodonaea, Notolea, Exocar pus, Hakea, Epacris, Xanthorrhoea, Frenela . The mountain slopes and ravines of the east have a well-marked vegetation . In character it is more akin to, and in many cases identical with, that of the west .

The tree See also:

fern (Dicksonia antarctica) in the mountain ravines is especially remarkable . The following genera are also found in such positions in great luxuriance, viz.: Fagus, Anopterus, Phebalium, Eucalyptus, Richea, Cyathodes, Pomaderris, Prostanthere, Boronia, Gaultheria, See also:Correa, Bedfordia, See also:Aster, Archeria, Atherosperma, &c . In the extreme west the trees and larger shrubs do not appear to ascend the schistose rocky mountain slopes of the central and eastern parts . Fauna.—See also:Animal See also:life in Tasmania is similar to that in Australia . The dingo or See also:dog of the latter is wanting; and the Tasmanian See also:devil and See also:tiger, or See also:wolf, are See also:peculiar to the island . The Marsupials include the Macro pus or See also:kangaroo; the opossums, Phalangista vulpina and P . Cookii; the See also:opossum-See also:mouse, Dromicia nana; Perameles or See also:bandicoot; Hypsiprymnus or kangaroo See also:rat; Phascolomys or See also:wombat; while of See also:Monotremata there are the See also:Echidna or See also:porcupine See also:ant-eater and the See also:duck-billed See also:platypus . The marsupial tiger or Tasmanian wolf (Thylacinus cynocephalus), 5 ft. See also:long, is yellowish See also:brown, with several stripes across the back, having See also:short stiff See also:hair and very short legs . Very few of these nocturnal carnivores are now alive to trouble flocks . The tiger-See also:cat of the colonists, with See also:weasel legs, white spots and nocturnal habits, is a large species of the untameable native See also:cats . The devil (Dasyurus or Sarcophilus See also:ursinus) is black, with white bands on See also:neck and haunches . The covering of this See also:savage but cowardly little See also:night-prowler is a sort of short hair, not See also:fur .

The tail is thick, and the See also:

bull-dog mouth is formidable . Among the birds of the island are the See also:eagle, See also:hawk, See also:petrel, See also:owl, See also:finch, peewit, See also:diamond bird, See also:fire-tail, See also:robin, emu-See also:wren, See also:crow, See also:swallow, See also:magpie, blackcap, See also:goatsucker, See also:quail, ground dove, See also:parrot, See also:lark, mountain See also:thrush, See also:cuckoo, wattlebird, whistling duck, See also:honey-bird, Cape Barren See also:goose, See also:penguin duck, waterhen, See also:snipe, See also:albatross and laughing jackass . See also:Snakes are See also:pretty plentiful in scrubs; the lizards are harmless . See also:Insects, though similar to Australian ones, are far less troublesome; many are to be admired for their great beauty . Population.—At the beginning of 1905, the state contained i8i,See also:ioo See also:people, giving a See also:density of 6.9 persons per square mile . The population in 187o was roo,765 . The See also:discovery of Mount Bischoff one year later, though it greatly stimulated See also:speculation and induced a large influx of immigrants, did not put a stop tothe outflow, for in 188o the population was still below 115,000 . During the next two decades there was a substantial advance; in 1890 it had reached 145,200, and in 1900, 172,980 . Like all the Australian states, Tasmania shows a decline in the See also:birth-See also:rate; in 1905 the births were 5256—36 less than in 1904—which gives a rate of 29.32 per See also: