Maitland. — ll’c.s^lcni A u.siraUaii Gcolof/i/. 
223 
Tlu're is ;i liod near tlio l)asc of llio formation C'V0 \v(1(mI with 
l){)uldei‘S boai'iii”' tho usual marks of ^'Uu'iov transported niat('rials, 
smdi as latcks nitli snu»otldy ]ilam‘d and farettod surfaces and 
srriatioiis. Siudi deposits have been recogniseil at a fi'reat many 
localities in Western Austialia, exlendinji' over \2 de^Toes (-f lati- 
tud{', and to within Id dej^rees of the etjuator. It having' lieen 
found convenient to have a name for this important hori/.on, the 
tei’in '‘T.yons Cbn^donierat e ” has been adopted, from the official 
desip-nation of the band District in which it was first discovered 
mill wlu-i'(> it is so well ilevclopod. 
Where this eoiig'hmienile eamiot lie seen its ]ireseiu'e is always 
indieateil by the hetevogeneims eoUeetiou of houhlers with whieh 
the Hats aie eovereil and -whicli are derived from tin- weatherinu,-, 
111 situ, of the bonhler bed. 
In a channel cut by the Wyndhmn Hirer in the Xortli-West 
Oivision, thnms'h the Arthur Hanoe, there is an im|)ortant exposure 
of the. boulder bed, whieh is not more than three feet thick in 
this locality. It is crowded with boulders mid |iebbles of the 
erystalliiie racks to the east, embedded in a calcareous fossiliferoiis 
matrix coutabiiiiu frafi'ineiits of /hib/raii, the brachiopoils Si.infe.a 
and rnuluctiis, in addition to tlie iiiolluse Avicutopectcu trinncollis. 
Tlio bed in wliicli tliese lioiilders ami pelililes occur is lieyoml 
all doubt of marine oripin, as is proved by its fossil eonteiits; 
it tlierefore can lianllv lie a S'l'mial iiioraiiie mid it is more tliaii 
likely tliat tlie materials of nliicli tlie iied is made up rvere trans- 
ported iiv tioatins ieel.ei-ss tliat drifted seaward after tliey liml 
lieen iirokeii off from soiiio extensive ice slieet wl.icl, emne down to 
soadovel in a siiinowhat similar iiiaiuier to tlie (ireat Harrier ice 
of the AiitiU'ctic Hepioim. 
1,1 the cirenmimlar veaious of liotli liemisplieres lioulder bear- 
ing elavs, muds mid sands, wldeli owe their origin to tlie distri- 
biitioii 'of continental debris carried seaward liy tioaling lee, are 
at the present time being laid down over a very large area of 
the ocean floor, and theso if consolidated wmiid |.rad,ice beds in 
every way identical to the Lyons (ilacial Congbinierate. 
There is in tlie Kimlierley Division a large develoiimeiit of 
Pernio-Oavlioniferans racks whicl, have yielded a remarkably neh 
asscmh!ag(‘ of fossilw. 
It was pointed out in the year li)07 tliat althougl, no ghieiP 
lioiilder iieds liad at tliat time lieen recognised in Kimberley with. a 
16 degrees of the e(|uator, their discovery in tliat region would 
cause little surprise. It is interesting in this connection to note 
that a conglomerate containing facetted and ice-scratclied boulders 
