t 
44 
E. DE C. Clahke and C. Teichert. 
Forman is Iho only geologist who has traversed the country between ' 
the ^lurehison Hivfu’ and Sliavk Bay west ol! the Carnarvon road and 
he r(*iiuirks <ui the almost entire absence of outcrops (Forman 1937), as ' 
indeed observations from the air would suggest. Some idea of the ^ 
geological structure of this area could perhaps be obtauied by following * 
the coast north from llu‘ inoulh of tlie Alurchison River, where coastal J 
cliffs 800 f(‘et high are ret)orted to exist. Tin' nearest known outcrop j 
of ,su]»i:osedly (i'eta<'eous beds farther inland is about 38 miles north j 
of Alt. Curious in the southern part of Ca.>bouni Station Avhcre Eorman ! 
(1.037) observed greensand in a dry soak. [ 
Another 33 to 40 miles farther north there are outcrops of Avhite ; 
to yellowisli shaly rocks witli brown chert bands which form low hills, j 
40 t() -)0 leet high, along the road leading to Carnarvon and about seven [ 
to 10 miles east of ilamelin Fool. We traversed this area in 1041, but 
iiad no tinu' to stop for any detailed ('xamination. The rock seemed to = 
resemble the Thii'indiiie Shale, but lithologically very similar rocks are 
also known from the Lower (Cretaceous Winning Series of the Cardal)ia 
Range, 2.")() miles farther norlh. 
Thoi’e are many limestone outcrops in the country south of Hamelin 
Fool, but these are probaldy Recent travertines. The country has the 
character of a slightly undulating karst landscape, with weather'd lime- 
stone ridges about three-(|iiarters of a mile to a mile apart, and red soil } 
accumulating in the dejii’essions. 
Oil]' only knoAvledge of suhsurfa('e geology comes from a few scat- > 
tered snh-artesian liores of which only drillers' logs and no samples are 
UAuilahh'. Aloreover, tor most of tin* bores the heights of the l)ore sites I 
above sea level are not known. 
Of particnlar interest is a group of bores (Xos. 6, 7, 8 and lOt 
in the vicinity of (tee Oie ()utcam|), on Arui’chison House Station, about 
O mde-^ north of Xnugajay Siting, and about 15 miles X.AAC of Alt. 
(Tirious. Tyoical of these is Xo. 10. 
Driller’s Log. 
Stratigraphic Interjiretation. 
0- 4 feet yellow sand ... 
4-12 feet red sandy cla}^ 
Surface de])osits, 12 feet 
I 
12- 40 feet Lfroen clav 
Second Gully Shale, 73 feet 
85-286 feet chalk . 
Toolonga C'halk. 201 feet 
280-334 feet dark shale 
Alinga Beds. 48 feet 
334-341 feet, sand . 
341—343 feet lilack sandstone 
Butte Sandstoue, 9 feet 
