318 Transactions. 



To this description I have little to add. No recognizable fossils have 

 been obtained from the Clarentian beds in either the Dee' or the Mead, 

 and consequently the beds have not been closely studied. The series 

 appears to be considerably thinner than at Coverham, but the thickness 

 is difficult to estimate owing to the contortions near the base. There is 

 also some sharp folding near the top, and the beds run nearly horizontally 

 for some distance. Before reaching the flint-beds, however, they once 

 more assume the dip of these. The actual junction is not exposed. 



Limburne Stream. — The series commences with pebbly mudstone, hard 

 sandstone, and a second pebbly mudstone, all striking nearly east and 

 west, and dipping to the north. The succeeding beds are a series of thin- 

 bedded sandstones and mudstones. No fossils were obtained, and the 

 junction with the flint-beds could not be observed. 



Dee River. — The Clarentian rocks are not well exposed on the banks 

 of the Dee River, and have yielded no fossils except fragments of 

 Inoceramus . The series commences with a pebbly mudstone followed by 

 a hard sandstone. Higher up the beds appear to be mudstones and thin- 

 bedded sandstones with few or no concretions. The total thickness appears 

 to be much less than that at Coverham. 



Branch, Dart, and Muzzle Rivers. — For this part of the district we must 

 relv solely on McKay's observations. He states that the lower part of 

 the Clarentian (so-called Amuri series) is essentially the same as in the 

 Mead and the Dee. The upper part in the Dart River, for some distance 

 below the commencement of the limestone, consist of " grey sandstones 

 and soft, crumbling sandy beds of dark colour, with small calcareous con- 

 cretions containing Inoceramus, and small spheroidal concretions of iron- 

 pyrites. ... In the Muzzle the beds are highly-contorted sandstones 

 and sandv or marly shales containing, near the under-surface of the 

 Amuri limestone, saurian concretions of enormous size, one specimen of 

 which, yet in situ on the east bank of the left branch of the river, is 

 about 14 ft. in diameter." The name of " saurian concretion " was given 

 from a mistaken correlation with the saurian beds of the Piripauan. 



Bluff River. — There are two outcrops of Notocene rocks in tbe Clarence 

 Valley near the Bluff River, separated by an anticlinal core of pre-Notocene 

 rocks. The north-western outcrop is similar in its structural relations to 

 those already described from Coverham to the Muzzle River, and is con- 

 tinuous with them. The south-eastern outcrop will be described later. 



In the Bluff River the Clarentian rocks are not well exposed, owing to 

 slips on the banks, and I was unable to observe certain beds evidently 

 exposed when McKay examined the section. The lowest beds I observed 

 were about 600 ft. of thick-bedded mudstones and sandstones, with a dip 

 to the south-east — i.e., aw^ay from the limestone. Higher up the river 

 there are sandstones on the west bank with a normal dip — viz., 75° to 

 the north-west — the strike being N. 50° E. 



McKay describes the succession as he observed it as follows : " The 

 lower beds of the Amuri series are for a short distance obscured along both 

 banks of the river. Rocks belonging to the younger series first show on the 

 south-west bank of the river as bancled sandstones with shaly beds between. 

 These are overlain by sandstones and conglomerates, some of the con- 

 glomerates containing fragments of a large Inoceramus and great numbers 

 of a large form of Trigonia. . . . Belemnites, usually as fragments, are 

 also found in these conglomerates. The sandstones are almost destitute 

 of fossils. To the north-west, and higher in the section, these beds are 



