368 HENRY B. KUMMEL 
On the shores of Raritan Bay they attain a thickness of 175 feet 
but diminish to the southwest and along Delaware River are only 25 
or 30 feet. They are slightly glauconitic near the top. ‘The Magothy 
rests unconformably on the Raritan but the discordance is not great 
and indicates only a slight epeirogenic movement. A marine fauna 
of 43 species, possessing close affinities to that of the Ripley beds of 
the south and to the Senonian of Europe, is found on the shores of 
Raritan Bay, but farther southwest the deposits are apparently 
estuarine. The flora is abundant and presents a much more recent 
aspect than that of the Raritan. It is regarded by paleobotanists 
as showing Cenomanian affinities. 
Merchantville clay—The Merchantville is a black, glauconitic, 
micaceous clay, usually greasy in appearance and massive in structure, 
weathering to an indurated brown earth. Its thickness is about 60 
feet. It is conformable to the Magothy formation below and the 
Woodbury clay above. Its fauna is large and varied and although 
it contains many forms common to the beds above and below, its 
most characteristic species are conspicuous for their absence or great 
rarity in the adjoining strata. The Merchantville clay represents 
the lower part of the Crosswicks clay of Clark, forms the base of the 
Clay-marl series of Cook, and is the lowest of the five formations in 
New Jersey which are correlated with the Matawan formation of 
Maryland. 
Woodbury clay—The Woodbury is a black, non-glauconitic, 
jointed clay about 50 feet thick, which, weathers to a light chocolate 
color, and when dry breaks into innumerable blocks, frequently 
with a conchoidal fracture. Its fauna of 95 marine species is more 
closely allied to that of the Magothy than to the subjacent Merchant- 
ville. It is conformable both with the Merchantville below and the 
Englishtown sand above. It is the upper part of the Crosswick clay 
of Clark, and forms part of the Clay-marl series of Cook. It is also 
one of the formations correlated with the Matawan of Maryland. 
Englishtown sand.—The Englishtown is a conspicuous bed of 
white or yellow quartz sand slightly micaceous and sparingly glauco- 
nitic. Locally it contains thin laminae of fine brittle clay. So far as 
known it contains no fossils. It decreases in thickness from roo feet 
near Atlantic Highlands to less than 20 feet in the southern portion 
of the state. It represents the lower part of the Hazlett sand of 
