JSTOR: Journal of Paleontology: Vol. 49, No. 1, p. 93 
Page 2 of 3 
and bentonitic layers with an uppermost l.S 
m (5 ft) thick of "grrass-grcen” beds (glau- 
conitic shales and glauconitic calcarcnites). 
Overlying this lower member is the Indian 
Cove Member, approximately 183 m (600 ft) 
thick of cherty Iinie.stones. A continuous sec- 
tion of the lower member is exposed, and fos- 
sils are therein ea.sy to collect; no continuous 
section of the upper member has ever been 
followed, as its outcrop is largely parallel to 
the strike of the beds. Fossils in the Indian 
Cove Member, although plentiful, are dif- 
ficult to extract, and silicified specimens are 
more easily collected. 
Problems facing the stratigraphy of the 
Grande Greve Formation are twofold. Firstly, 
the lithology of the Grande Greve Formation 
changes westward and, secondly, the faunas 
previously described from the type area of the 
Formation are assigned only with difficulty 
(if at all) to the present lithostratigraphic 
framework. 
The Grande Gr^ve Formation extends some 
225 km (140 miles) west of Cape Gaspe. In 
these areas away from the Forillon peninsula, 
the Grande Greve Formation is commonly dis- 
tinguished from the underlying Cap Bon Ami 
Gumming, 1959) are best assigned to 
Saint-L6on Formation. There is thus litti 
common betvreen the Grande Grfive Forma 
of the Forillon peninsula, and the strata cs 
by the same name farther west. The for 
tional names applied by those who maj 
a particular area will he used here and 
ages of the trilobites from these beds wil 
those ages obtained from the accorapan; 
brachiopods (identified by A. J. Boucot) 
Biostratigraphy.— -The age assignment oi 
the described fossils from the Forillon pe 
sula is a vexing problem. Sir W. E. Lc 
(I-ogan et al. 1863) named the strata of 
Forillon peninsula the “Gaspe Limeston 
and divided them into eight units (coramt 
referred to as “members”) (Text-fig. 2). 1 
8 corresponds exactly to the Indian Cove M 
her of L. S- Russell; unit 7 on the other h 
differs. The Shiphead Member is 39 m (128 
thinner than Logan's unit 7, although the .s; 
upper contact of the “grass-green beds” 
chiphead is used as a boundary bet\veen 
strata. Billings (1874) began a descriptior 
the fossils of the Gasp6 Limestones; the 
jority of the fossils described came from i 
8 and none is identified as coming from u 
http://www.jstor.org/view/00223360/ap040280/04a00070/2?frame=noframe&userID=82... 10/29/2007 
