40 
E. DE C. Clarke and C. Teichert. 
the sea coast and clue north of Tutula windmill. The shale is well 
exposed all along the sides of this valley. 
Areal distHbution and oatcrup.-^.^Thv S(‘eojid tlully Shale is of somewhat 
limited distribution. Jt is absent from the north-eastern halt of the area 
where it has been removed by ero.^iim. Owing to the general Avesterly 
dip of the entire sedimentary sei’ies it begins to appear above the chalk 
in the Toolouga Hills seedion. The oiitci’ops are here very poor', because 
the thin cover of shales is almost entirely indurated and penetrated by 
travertine. The appearance ot' the diiricrust is liere that of a travertine 
(or ^‘caliche*’) in which fragments of porcellanized green shales are 
embedded. West ot‘ Toolonga Hills the thickness of the shales increases, 
owing to the general north-Avesterly dip, and they are well exposed in 
Second Gully, in the valley between Second Gully and the coast, at 
Second (inlly Point, and at Alinga. They probably form the top of the 
coastal cJitTs north of the Murchison Kiver, but the durierust layer is 
here very thick and no outcrops of the shale were observed. South of the 
Murchison River the Second Gully Shale occurs at Meanarra Hill, where 
it forms tlu‘ top of the series, but is poorly exposed owing to heavy duri-, 
crust formation. 
Scojie . — Tile Second Gully Shale forms the highest beds of the Murchi- 
son House Series, in the mapi>ed area. Its contact with the Toolonga 
Chalk is never well exposed, owing [lartly to induration of the beds near 
the top of the scarps, partly to heavy slumping of the fine-grained rocks 
along the slopes (fig. 14). 
Text Fig. U. 
Chalk slips in the scarp west of Toolonga. Tlio chalk is in s!ta 
only near the top of the scarp. 
