HORN EXPEDITION GENERAL P.EOLOr.Y. 63 



sometimes higlily indurated, as at 8toi'm Creek, surmounted liy tlie Desert 

 Sandstone. Tlie prcvailiuLf ari;illaecous fdiniation in tlie southern area of tlie 

 Cretaceous l)asin continues north to Dalliousie Springs, where fossils occur, as 

 described by East* (viii.). To ^Nlr. Byrne, in cliarge of tlie telegrapli office 

 at Charlotte Waters, the writers owe the possession of examples of Crioceras 

 australis and a coral, preserved in chalcedony, collected in the neighl)our- 

 hood of Charlotte Waters ; Ijut ]Mr. East obtained specimens of Lingula 

 snbovalis in a glauconitic clay-stone at IMount Daniel, which is about twenty miles 

 north of Charlotte Waters, and the most northern occurrence of a marine fossil of 

 Upper Cretaceous age within the T^ake Eyre basin. 



Mount Daniel is 1330 feet al)o\'e sea level, and its geological structure in 

 descending order is as follows : — Desert san<lstone, 18 feet ; purple and gn^y shale, 

 22 feet ; red shale, 40 feet ; yellow and grey shale, thickness unknown. As we 

 go north from jMount Daniel, and towards the Upper Cretaceous shore-line, the 

 shales and clays appeal' to hi\ replaced by sandstone, which is only what might be 

 expected, namely, that the rounded sand grains would be deposited nearer the 

 shore, whilst the laiiielhe of clay were carried towards what is now the centre of 

 the basin. Tn illustration of this change in sedimentation the following sections 

 are introduced : — 



7////, t7Vo miles from Goydcr River. — (1), Highly ferruginous grit, lo feet ; 

 (2), ferruginous sandstone, (i-^) teet ; (3), white friable sandstone, 20 feet ; (4), 

 ferruginous grit, .sandstone and cherty shales, 20 feet ; (f)), red iron-stained sand- 

 stone, micaceous, and in pl.ircs gritty, GO feet ; (fi), fr-iable white micaceous 

 sandstone containing a nioilerat(^ ipiantity of salt, which etlloiesces out of it, 

 20 feet ; total thickness, 200 feet. 



Hill, between Goyder River and I. ilia Creek. — (1), Ironstone, .sandstone and 

 shale cemented by iron, 10 feet; (2), argillaceous sandstone, 1 foot; (3), ferru- 

 ginous sandstone, 30 feet ; (4), coarse grit, 3 feet ; (•")), whiti^ frial>le sandstone, 

 100 feet; total thickness, 144 feet. 



Aloiint Afiis_ii;rave. — (1), D(»sert sandstone, It) feet; (2), white friable sand- 

 stone in beds, which show a slight northerly dip, .about 200 feet. ; (.3), ferruginous, 

 very micaceous, clayey sandstone, with thin bands of white s.uulstonc, about 

 200 feet. 



* The follouiiij; species from tliis loeulity have heeii under observation :- .Vif^Va riii'inhilis, Maccui/elln 

 relieclK, MudinUi in/lal<t, VaiiUinn, sp. 



