158 R. ETHERIDGE, T. W. E. DAVID, AND J. W. GRIMSHAW. 
On tHE OCCURRENCE or a SUBMERGED FOREST, wir 
REMAINS or raze DUGONG, ar SHEA’S CREEK, 
NEAR SYDNEY 
By R. Erueriper, Junr., Professor T. W. Epceworrn Davi, 
B.A., F.G.8S., and J. W. GrIMSHAW, M. Inst. C.E., 
[With Plates VIII. - XI.] 
[Read before the Royal Society of N. 8. Wales, August 5, 1896.] 
CONTENTS: 
I.—References ed previous observers to movements of the East Aus- 
tralian Coast. mld heemiinaty (2) Elevation. (3) Stability. 
II.—Shea’s cia (1) The locality as it was before the Canal was 
menced. ee Guned ecbeieal Features. (3) Details of 
che. Section exposed in the Canal. (4) Description of the 
remains of the Dugong. (5) Traces of Man’s Presence. (6) 
Description of the Submerged Forest. 
III.—Deductions. (1) As to the evidence of Subsidence. (2) As to the 
geological antiquity of man in Australia. 
I.—ReEFERENCES BY Previous OBSERVERS TO MOVEMENTS OF THE 
AUSTRALIAN Coast. 
Evidence proves that changes have taken place, in comparatively 
recent geological time, between the relative levels of land and sea 
on the East Coast of Australia. The evidences may be divided 
into two classes, according as they show (a) a negative movement 
(subsidence) of the land or corresponding positive movement of the 
sea, as the case may be—[For this the term submergence will be 
used in this paper]—(6) a positive movement (elevation) of the 
land, or a corresponding negative movement of the sea. 
(1) Submergence.—As this paper relates to submergence, 
evidences of submergence may be taken first. Darwin was in 
favour of the view that the Great Barrier Reef of Australia was 
evidence of submergence, though he does not supply many details.’ 
1 Journal of Researches, 2nd Edit., 1845, p. 474. 
