CHAPTER XXVII. 
THE TEIAS-JUEA SYBT'EM.— continued. 
THE IPSWICH EOEJIATIOJI (UPPER TRIAS-JURA), IN THE TYPE DISTRICT 
The outcrop of a nine-inch seam of poor shaly coal is seen in the railway cutting 
(Brisbane Valley Branch) south of the bend of the Brisbane Eiver, south-east of 
Lowood Station. It lies beneath a thick bed of sandstone, and overlies a considerable 
thickness of soft sandy shales and thin bedded sandstones. The strata undulate 
gently, but dip, if anything, to the east. 
A well in Portion 473 (D. Kennally’s), Parish of Walloon, gives the following 
section : — 
Surface (sand and boulders of basalt, &c.) 
Decomposed sandstone 
Brown feiTugino-calcareous sandstone, with plants 
Coed ... ... ... 
Pine conglomerate and grey sandstone 
Feet. 
60 
10 
10 
3 
67 
I'lO 
The dip of the strata is about 1 in 12 to the east. The water in the well is 
rather salt. 
In the whole of the Eosewood District, within a circle of five miles radius of 
the Town of Marburg, the strata consist, for the most part, of sandstones and shales, 
with beds of red hsematite nodules ; but there are very few continuous sections. A 
landslip, which took place owing to the heavy rains of the beginning of the year 1890, 
exposed a two feet bed of limestone on Portion 518 (Gadischki’s), Parish of Walloon. 
The strata are, on the whole, nearly horizontal, and are surmounted by isolated 
cappings of basalt, forming the higher hills of the district. 
A series of very remarkable landslips took place in the Eosewood Scrub District 
in the beginning of 1890, following on a wet season of unprecedented severity. In this 
district the primeval “scrub” or jungle had been cleared, and the land settled and 
cultivated by a colony of G-erman farmers. The great depth of soil, which was often of 
a clayey nature, had been saturated with water till it became semi-liquid mud, and 
travelled dowm the slopes of the hills. At least a hundred acres of land “travelled” 
more or less on different farms. In some cases the lateral movement was as much as 
a hundred feet. The removal of the scrub was one of the most powerful predisposing 
causes of the ruinous havoc. The superficial layer of soil, though held together for a 
time by the roots of the growing crops, was finally rent asunder into huge crevices like 
those on a glacier. 
After the landslips had taken place, it was constantly to be remarked that springs 
and gullies, which before the floods had been sources of fresh, or nearly fresh water, 
had become so highly charged with saline solutions as to be unfit for drinking. This 
could only mean that the water which in ordinary seasons penetrated the crust of the 
earth percolated only through str.ata from which the soluble salts had been already 
