6 
Glauert — Gin.gin ClialJc. 
The presencG of Chalk in the vicinity of Dandarragaii ami Yath- 
eroo has long been suspected. Gregory’s map of I860*, published iv. 
1861, shon-s patches of ''Chalk” and Sandstone containing dints and 
Cretaceous fossils ’ ’ at Gingin and Yatheroo. H. Y. L. Brown in 
his General Report of 187.8 refers to ‘'the white chalky limestone 
of Gin Gin, Yatheroo and Dandarragan ’ ’ of ilesozoic age. 
Ill 1907 Mr. W. n. (’ampbell examined “ tlu' Bliospliatie Dejiosits 
near Daiidaraga (1907), in his re])ort he mentions a series ot 
limestone hills ca])])e(l witli laterite and descidbes two ]>atches of 
limestone. late. 1187 near Emu Hill and Locs. 888, 867 (Whitfields), 
a few miles to the south of Knui Hill, but beyond comparing "tle> 
characteristics of the bone bed series Avith the f('rruginous sand- 
stones of Greenongli River district which, contain Jurassic 
fossils” makes no reference to the proiiable age of the limestone 
and its assocnated beds. 
Three years later. Campbell states (1910. ]) 64) “the Ba.u- 
daraga ferruginous Sandstones are ])robably of Jurassic ag"'. 
I'diile the Limestones eastward and northward from there are 
] mssibly Cretaceous.” 
Jn 1912 T)r. K. S. Sinptson }H‘oved the '‘bones” of Canii)l)ell 4 
hone beds to be j)iec(‘s of fossil Avood “provisionally classed as 
Ccdroxyloti/' (1912 ]> .86). 
IMr. T. Blatchford’s re])ort on “the Possibility of obtaining 
Artesian Water in the vicinity of Moora,” (1912 ]}. 60), contains 
the statements ‘‘Samples eolleeted from tliese deposits (the lime- 
stones at Dandarragan and Yatheroo) sliow the presence of fossil 
shells Avhicli are identieal Avith those found in similar limestone 
Iteds of Gingin, a]id it S(‘ems eertain that they art* of the same 
getdogical age, i.e. Cretact'oiis, and in fact are a continuation er 
the same beds. A specimen of tlie rock collected from near 
atlieroo homestead, on close examination was found to contain 
the following: — -Fragments of InoceiYimus shells, rounded black 
nodules, and green specks and stains. The remnants of the 
Inocemnnts sliclls occur in small flat fragments resembling some- 
Avhat tubular secondary minerals. They are vei-y frefinent in their 
occurrence in the Gingin series, Avhere they have been found almost 
complete,” and (ib. p61) '‘Two specimens collected from a lim-.- 
stone hill near Kajamba (Kayanaba) and presented by Mr. E. 
* Ror a Bibliograiihy of the Gingin Chalk prior to 1910 see 
(rlauert, “Tlu* Geological Age ami Organic Remains of the Gingin 
Chalk” in Geol. Surv. W.A. Bulletin 86. Palaeontologic:il Contri- 
butions III,, Art \ HI., 1910. A list of more recent publications 
dealing Avith the subject and others referred to in the text, is 
appended to this paper. 
