Proceedings of the Royal Geographical Society of Australasia, South Australian Branch (Incorporated). Volume 7-13 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1904 Excerpt: ...marine deposits form cliffs at Queenscliffe and continue for some distance along the shores of Nepean Bay. Much of the Tertiary limestone has been operated upon by rainwater, dissolved, and pedeposited in the form of surface travertine and marly subsoils, which have a thickness in places of 15 ft. or 20 ft.' At Queenscliffe the Tertiary limestones are seen to rest on the eroded surfaces of the glacial-till, supplying the evidence that the latter is of Prc-Tertiary age. In middle or late Tertiary times Kangaroo.Island was the scene of volcanic activity. A fissure-vent existed at one time near the original settlement on the island, at Kingseote, at the entrance to the Bay of Shoals. It appears to have had but slight explosive force. Streams of lava flowed down some of the old river valleys, one of which is seen in the cliffs near the Kingseote jetty, and has been worked for road metal. An important lava-sheet flowed in a north-westerly direction, and to-day occupies an elevated position, forming the Gap Hills, resting on an old sandstone floor, which is probably of Miocene age. No pakeontological evidence has been obtained by which the volcanic Sec PLite XXIII. action might be correlated, or otherwise, with the volcanic regions of Millicent and Mount Gambier. The present elevated position of the basaltic rocks give evidence of much waste and lowering of the land-surface since this period of volcanic eruption. PORT LINCOLN. Port Lincoln was visited during this cruise of the "Governor Musgrave," and the rocks along the shore examined, but the time spent on the spot was too brief to secure many scientific results. The geological structure is extremely varied and complicated. The rocks consist of highly crystalline schists and augen-gneiss, carrying aci...