NORTHERN OUTCROP, CUMBERLAND COAL FIELDS—-GILPIN, 588 
PRODUCTIVE COAL MEASURES. 
Dipper mart. te tye ec alditchtt se ipo iw - 2134 feet. 
see ee, 2 Ac oh ue Gs eee ahha sey 2628 ..° 
4757 feet. 
MILLSTONE GRIT. 
Wiper, water ccsie. aoeue a Scale ny 5 incjen, ,- 2000 feet. 
LDC OLR Red Se NS, Oe em eS 8: s240 
“Li PERTH Mage Sor a 3 2 i dtl 640 “ 
5880 feet. 
The lower part of the Upper Coal Measures is exposed at Rag-~ 
ged Reef, where it is made up chiefly of hard and massive gray 
and white sandstones, with occasional beds of a reddish colour, and 
red and gray shales. 
The upper part of the Productive Coal Measures comprises 
about 1000 feet of gray sandstone, and nearly the same thickness 
of gray and reddish shale and tire clays. It contains 22 coal beds, 
all of which are thin and of poor quality as exposed on the shore, 
and will not be again referred to in this paper. 
The lower part of the Productive Measures, holding all the 
workable seams yet known on the shores, is characterised by 
ray sandstones, and gray and dark coloured shales. 
The Millstone Grit series forms an abrupt change in appearance. 
to the measures holding the coal beds. It consists of reddish 
shales and red and gray sandstones, the latter passing into fine 
grits and conglomerates. It is, moreover, destitute of coal, and 
shows very few fossils beyond a few drifted pieces of wood. 
The following section of the lower part of the Productive 
Measures shows the principal coal beds and their relative posi- 
tions :— 
e 
o 
Feet. In. Feet. Tn. 
S10 3 eae ae 33¢ Fc — — 
Main Seam........ == ie 7 
StLabaiocs tila dy eat. sot 75 ) — — 
Queen Seam........ _ 4 10 
BUM MGE as uate kc ae 968 0 — — 
Goal bed). 522: 4 0 
SEPataes. ae 2 eee 18 — — — 
New Mine Seam.... — 3 O 
Suratas. =<: ie ORE as. ie ee 22S: ee 
