165 
Ft, jli. 
Grey shaly fireclay, willi rootlets 0 4 
Darker shale 0 8 
Groy-hrown ferruginous shale — s, ms.%% oi Glossopteris ... ... 0 4 
Crumbling brown shale 0 6 
Grey-brown ferruginous shale — a mass of Glossopteris ... ... 0 3 
Grey shale, with Cffossopfem, &c. 
Grey sandstone, thin-bedded, with ooeasional plant-remains 30 0 
Mr. A. C. Gregory reported as follows on a sample of the MacArthur Seam ; — 
Yolatile in coking ... ... ... ... ... 28'8 
Fixed carbon ... ... ... ... ... ... ... 38'6 
Ash ... ... 
100-0 
Specific gravity, 1-67. 
“The specimen appears to be injured by weather, and the coal will probably 
improve at a greater depth. The percentage of ash is so high that the coal would be of 
little value unless, by a careful selection from the best parts of the seam, the proportion 
of ash should he lessened.” Mr. Gregory had no opportunity of seeing the true cause 
of the deterioration of the coal. 
Near the head of Jack’s Creek the strata of the Upper Series are thrown down by a 
fault against the older quartzites, greywackes, &c., of the Clarke Eange, and on approach- 
log the fault become nearly vertical. The strata consist mainly of dark shales, with thin 
l>eds of hardened sandstone, and there arc also a few beds of dark-blue crystalline lime- 
stone, apparently unfossiliferous. These ai’e the only limestones which I observed in the 
flpper Series — at least in the typo district, xi dolerite dyke which has come up along 
tile bedding-planes of the shales and sandstones thi’ows off a branch at an angle of 45 , 
■which “jumps” without being shifted by any fault, as sketched in PI. 52, fig. 4. 
Por three miles up Jack’s Creek, above the level of the IVEacArthur Coal-Seam, 
tile strata are horizontal, so that their thickness is equal to the fall of the creek 
Pi^obably less than two hundred feet. The section is, however, very imperfect, the 
rocks being only exposed at long intervals, except in the lower roaches of the creek. 
These arc invariably either grey shales or greenish-grey sandstone, which is sometimes 
pebbly. About a mile north of the river a thickness of about fifty feet of greenish-grey 
^S'Udstono is seen, containing numerous large drifted coniferous trees. The trees. 
Which are silicified to a black flint, and sometimes opalisod, occasionally retain some of 
the branching roots. Pragmeutary plant-remains, in a carbonised condition, are also 
Common. About half a-mile from the river the crook divides into two branches, both of 
which show, for some distance up, section of the greenish-grey pebbly sandstone, with 
silicified drifted trees. One tree measured thirty-one feet in length, and tapered from 
Iwelve inches to three inches in diameter. 
On the road from Havilah to Biralce, about a quarter of a mile west of Eosella 
toek, large silicified trees lie on the surface, in one of which I counted about thirty 
l^jngs of growth. Between the second and third Traverse Stations on Eosella Creek, 
“6 following strata, which dip to 8. at 15°, are seen on the right bank : — 
Bluish cross-bedded sandstone, weathering spheroidally, full of 
carbonised and silicified plants, including coniferous trees. Largo 
unrounded boulders of metamorphic rock occur sporadically 
throughout — about 
Dolerite sheet 
Grey shales and finely laminated sandstone, with thin bands of sandy 
ironstone 
