ON CERTAIN BOULDERS OF THE GYMPIE GOLD-FIELDS. 297 



the case -with the Spirifers, which in these beds are represented by 

 many species, while in the Bowning Beds there are few. Rhyn- 

 chonelheuve plentiful, and Atrypa is well represented by numerous 

 individuals of at least one species ; but the familiar A. reticularis 

 and A. inarginnlis have not been unearthed. Gasteropods are 

 represented by large and sni.ill 2[urc]iisonia. 



From a collection of fossils from the Cave Flat Limestone, in the 

 Australian Museum, and collected by Mr. C. Jenkins, L.S. of 

 Yass, Mr. Felix Ratte has identified the jaw of a tish, and 

 some forms collected by myself resemble fragments of a Coccosteus, 



The general facies of the life has led to the conclusion tliat they 

 are of Devonian age ; but it remains yet to be proven whether 

 they follow or are contemporaneous with the Bowning beds. 

 From a thin band of shale at the base of the greater limestone 

 bed I obtained a trilobite, belonging to the genus Cromus, and 

 apparently identical with one in the Bowning beds and which I 

 have never found above the Lower Trilobite bed of that forma- 

 tion. This of itself is not of much consequence, but nevertheless 

 suggests the possibility of contemporaneity of the two series. 



One of the most interesting features of the Cave Flat beds, is 

 the numerous and large caves in the limestones. 8ome of tlieui 

 contain bone beds of considerable extent. In the case of two 

 at least, this was clearly proved in June last by Mr. R. Etheridge 

 and myself, during a few days exploration. 



2._N0TES ON CERTAIN BOULDERS MET WITH IN 

 THE BEDS AND REEFS OF THE GYMPIE GOLD- 

 FIELD, QUEENSLAND. 



By William H. Rands, F.G.S., of the Geological Survey of 

 Queensland. 



In the coui'se of a Geological Survey of the Gympie Goldfield, 

 I have several times noticed the occurrence, in a fine shale, of 

 isolated boulders of considerable size, which will form the subject 

 of these notes. 



Short desci-iptions of the Geology of this field have been written 

 by the late Mr. C. D'O. H. Aplin, Hon. A. C. Gregory, and more 

 lately by my colleague Mr. R. L. Jack ; * it will be suificient, 

 therefore, if I here state that the auriferous strata consist chiefly 



* Report of the the Government Geologist for Southern Queensland (C. D'Oyly H. Aplin), 

 Brisbane. By auihority, 1868. Report on tbe Geology of the Wide Bay and Burnett 

 Districts by A. C. Greifory, Brisbane. By authority, 1»75. Progress Report for 1885, by 

 R. L Jack, Government Geologist, Brisbane. By authority, 188S. 



