Page:Quarterly Journal of the Geological Society of London, vol. 35.djvu/34

8 2. Newer Plutonic

A. W. HOWITT OK THE PHYSICAL GEOGRAPHY AND

Table of the Igneous HocJcs of North Gippsland.

{(a) Granites which have invaded and me- tamorphosed Silurian strata, as at Dargo, Neoyang, Deddick, Delegete, Omeo, &c.

(b) Quartz-porphyries of the Snowy Biver, Mount Wombargo, Mount Tambo, Mount Taylor, &c.

(c) Dykes of compact, porphyritic, and quartziferous felstones of Omeo, Neo- yang, Tabberabbera, &c.

(d) Amorphous masses and dykes of por- pbyrite of Mount Leinster (?), Bul- gurback, &c.

(e) Amorphous masses and dykes of green- stone and other basic igneous rocks of Omeo, Limestone River, Maximilian

k Creek, Tabberabbera, &c.

( (/) Felstones (lavas), asb, and agglome- rates of Mount Wombargo and the Black -Mountain tableland, Snowy Bluff, Tabberabbera, Maximilian Creek, &c.

{g) Dolerites and basalts of the Snowy ^ Bluff.

(h) Dolerites and basalts of the Dargo High Plains, Cobungra, Nunnyong, Gelan- tipy, Tubbut, &c.

I (i) Metamorpbic crystalline schists of the Omeo district.

(&) Indurated rocks, spotted schists, Horn- fels, &c.

3. Palcsozoic

4. Tertiary.

1 — ' S i I— I rt I M

Note. — I have used the term "Plutonic" as being the most convenient I can at present use for purposes of classification. It is probable that the term " Hydro-plutonic " might be better.

I. Loavepv Paleozoic.

1. Silurian.

(a) Rocks referable to this age are exposed over a large part of the district ; but the areas are not continuous, and the boundaries somewhat difficult to define shortly in words. Broadly viewed, a description may thus be given : — The largest area will be found between the Mitchell and Tambo rivers, north of the road from Bairnsdale to Bruthen. It includes almost all the drainage-areas of the Mitchell and Nicholson rivers and that of the west side of the Tambo Biver, south of a line drawn from Mount Balahead to the Fainting Bange. The next area in size is found between the Snowy Biver, the boundary-line of the Colon) r, and the sea- coast. Outcrops are met with of various sizes, as at Bendoc, at Mount