60 binnie: mesozoic rocks of the korth-east coast of irela^^d. 
Pecten qiiinquecostatus. Ditrupa deformis. 
„ quadracostatus. Microbacia cardiuia.. 
Rhynchoiiella latissima. 
(c) Chloritic sands and sandstones. This is included under the 
head of what has been termed Mullato stone, owing to the 
fact that it is composed of partly sand and partly chalk. 
In the Woodburn Section, above described, there is some 
slight evidence of an unconformity existing between this 
and the underlying gTey marls. These beds chiefly con- 
sist of siliceous sands in a calcareous paste, with disseminated 
chloritic grains, more and more compact higher in the series, until 
they finally pass up into limestone. ^Ir. Tate takes the Anan- 
chytes ovatus bed as indicating the point where this deposit passes 
to the chalk, but the passage is so extremely gradual that no 
lithological line can be drawn. The fossils are : — 
Inoceramus crispi. Spondylus spinosus. 
Ostrea semiplana. Heteropora cryptopera. 
Terebratula obesa. Catopygus carinatus. 
Pecten quinquecostatus. Epiaster distinctus. 
On passing to the west from Woodburn river, this division 
becomes a siliceo-chloritic sandstone. These are the most fossiliferous 
sands, they are exposed at Black Mountain, Colin Glen, &c. 
Mr. Tate describes it as an imperfectly bedded, white limestone, 
with splintry fracture and layers of flints. Beyond Colin Glen to the 
S.E. it rests directly on the red marls. Throughout the district des- 
cribed it is capped by flints imbedded in ochreous clay. These flints are 
bright red and encrusted with calcareous cement. Tate saj^s the heat 
of the lava has oxidised the brown oxide of iron into the red oxide. 
Jukes does not agree with him on this point, though Barrois does. 
Jukes describes the basalt as containing lignite and iron bands. The 
flints, when broken, exhibit concretionary structure, varying from 
grey to red, as we pass from the centre to the outside, the covering 
of white being due to weathering after the red tints occurred. He 
describes a quarry where we have from the top : — 
Rhynchonella robusta. 
„ latissima. 
carnea. 
Serpula filiformis. 
Pleurotomaria perspectiva. 
Cidaris vesicularis. 
