46 
The tertiaries of the River Mitchell are more interest¬ 
ing. At Eagle Point, on the right bank of the Mitchell, 
we found this section :— 
a. River bank (alluvial)..—— b. Surface soil—sand and pebbles. c. Com- 
pacted gravel beds—iu places cemented by ferruginous infiltrations with pebbles of 
quartz—indurated slates, and porphyries.- d. Horizontal ochreous sand-beds 
(marine, probably upper tertiary). 
Near Bairnsdale a section across the river shows the 
limestone on both sides :— 
RIVER MITCHELL 
a. Flood-plain of river.- b. Bairnsdale limestone—marine (middle tertiary). 
The area occupied by the middle tertiaries is about 37 
square miles. They yield good soils, with an abundance 
of carbonate of lime. 
At Tam bo we saw the last of the Gippsland tertiaries. 
Here we entered on a country occupied by older Silurian, 
metamorphosed, and granitic rocks : there being ap¬ 
parently a passage from the sedimentary through the 
metamorphosed rocks to a ternary granite. Accurate 
surveys and a very careful examination of the rocks are 
