11 
lenses of limestone and shale are parallel to the cross-laminations. 
The sandstones contain many coral heads; the limestone lenses 
are largely composed of Strophomena fluctuosa and are really 
conglomerates. 12 feet. 
6. Thin-bedded quartz sandstones and sandy limestones. 
Contains many small Beatricias. 5 feet. 
5. Undulatory, grey limestone in which are many horn 
corals. Bedding poorly defined with tendency toward a nodular 
structure. Occasional big limestone boulders up to 8 inches in 
diameter. Contains many young Beatricias and other corals. 
8 feet. 
4. Sandstones as in zone 3, but corals very rare. 6 feet. 
3. Thin-laminated, grey quartz sandstone with occasional 
layers of thin, shaly limestone. Bedding very undulatory. The 
sandstones are much cross-laminated and contain boulders of 
limestone up to 6 inches in diameter. Large heads of Favosites 
up to 3 feet in diameter are common. Some beds contain 
Beatricias lying around like broken logs in fallen timber. 
20 feet. 
2. Grey quartz sandstone like that at Grindstone cliff with 
which the base of this zone may overlap. Contains rounded 
boulders of dark-grey limestone up to 3 inches in diameter. 
Near the base many Beatricia undulata and Syringopora. Basal 
beds of cape James. 50 feet. 
1. Fine-grained, thin-laminated, grey quartz sandstone, 
beds up to 3 feet thick. Hardly any fossils. Forms the main 
portion of Grindstone cliff. Considered basal zone of Ellis 
Bay formation. 30 feet. 
Correlated with these lithic differences are faunal differences. 
On the south shore Cyphotrypa bulbosa f Clitambonites diversus , 
Dinorthis anticostiensis , and Platystrophia regularis occur in the 
basal zone of the formation in great abundance. Only the last 
has been found in the exposures of Vaurial river and north shore. 
Orthis laurentina is extremely common in some of the zones of 
the basal portion in the southern exposures and with it in its 
lowest occurrence are many Atrypa marginalis. One or two 
O. laurentina have been found on the north coast in Prinstie 
bay, but no A . marginalis . In the Vaurial River section 0. 
