Three Expeditions into the Interior of Eastern Australia, Volume 2 / With Descriptions of the Recently Explored Region of Australia Felix, and of the Present Colony of New South Wales

by T. L. Mitchell

Geological specimens collected.
Connection between soil and rocks.
Limestone.
Granite.
Trap-rocks.
Sandstone.
Geological structure and physical outline.
Valleys of excavation.
Extent of that of the Cox.
Quantity of rock removed.
Valley of the Grose.
Wellington Valley.
Limestone caverns.
Description and view of the largest.
Of that containing osseous breccia.
First discovery of bones.
Small cavity and stalagmitic crust.
Teeth found in the floor.
A third cavern.
Breccia on the surface.
Similar caverns in other parts of the country.
At Buree.
At Molong.
Shattered state of the bones.
Important discoveries by Professor Owen.
Gigantic fossil kangaroos.
Macropus atlas.
Macropus titan.
Macropus indeterminate.
Genus Hypsiprymnus, new species, indeterminate.
Genus Phalangista.
Genus Phascolomys.
Ph. mitchellii, a new species.
New Genus Diprotodon.
Dasyurus laniarius, a new species.
General results of Professor Owen's researches.
Age of the breccia considered.
State of the caverns.
Traces of inundation.
Stalagmitic crust.
State of the bones.
Putrefaction had only commenced when first deposited.
Accompanying marks of disruption.
Earthy deposits.
These phenomena compared with other evidence of inundation.
Salt lakes in the interior.
Changes on the seacoast.
Proofs that the coast was once higher above the sea than it is at present.
Proofs that it was once lower.
And of violent action of the sea.
At Wollongong.
Cape Solander.
Port Jackson.
Broken Bay.
Newcastle.
Tuggerah Beach.
Bass Strait.

GEOLOGICAL SPECIMENS COLLECTED.

As any geological information respecting a country so little known as the eastern coast of Australia may be acceptable to the public, I venture to subjoin a few observations on some of the more prominent subjects of my researches, and I do so with the more confidence because it will appear how largely I am indebted for the interest they possess to the kindness of my scientific friends in England.

CONNECTION BETWEEN SOIL AND ROCKS.

During the surveys and expeditions I carefully collected specimens at every important locality, and I have thus been enabled since my return to England to mark upon my maps the geological structure of the country. By this means also I have been able to determine the relative value of the land in the districts recently explored and to compare it with that of the country previously known.

By a little attention to the geological structure of Australia we learn how much the superficial qualities of soil and productions depend upon it, and where to look for arable spots amid the general barrenness. The most intelligent surveyors of my department have on several occasions contributed considerably to my collection.

Curiosity led me to investigate some of the fossil remains of those lately discovered regions while my public duties obliged me to study also the external features of the country; and I have thus been enabled to draw some inferences respecting various changes which have taken place in the surface and in the relative level of sea and land.

The following are the principal rocks which I noticed in the country.

LIMESTONE.

Limestone occurs of different ages and quality presenting a considerable variety.