NJGS - Bulletin 61-I. The Cretaceous Fossils of NJ - State of New ...

20 CRETACEOUS FOSSILS
-
Ezogyra cancellata zme. This is a more restricted zone forming the
base of the Exogyra costata zone. It has bee11 traced a distance of 2500
miles from Atlantic Highlands, N. J. to Cardenas in the State of San
Luis Potosi in IZe~ieo. (Stephenson, 1933).) In Kew Jersey the zone
is almost identical with the Jlount Laurel formation although a few
specimens of E. cancellafa have recently been reported from the Navesink.
In Delaware, where the Monnt Laurel and Navesink formations
are combined, E. cancellata is found throughout the combined formation
(Groot, Organist and Richards, 1954). Some of the other species generally
associated with the Ezogyra ca%cellata zone are: Ostrea falcata,
0. panda, 0. plzbntosa, 0. tecticostota, Gryphaea convexa, E. costata,
Pectem sinzplicius, Anmia argentaria, A. tellinoides, Paranonaia scabra,
and Belemnitella amerieana. The only one of the above mentioned species
limited to the Mount Laurel sand is Anomia tellinoides.
TABLE 5. Average thickness (at outcrop) and dip of Cretaceous formamations
of New Jersey
TINTON
RED BANK
NAVESINK
MOUNT LAUREL
WENONAH
MARSHALLTOWN
ENGLISHTOWN
Average thickness at Average southeastward
outcrop in feet dip in feot per mile
10-20 in Monmouth Co.
only
140 in Monmouth Co. Not
present south of Sykesville.
3-40
5-60
20-35
40-50
140 in Monmouth Co. to
about 35 feet in Salem Co.
WOODBURY
50
41
MERCHANTVILLE 46-60
42
MAGOTHY
RARITAN
115 on Raritan Bay and
diminishing to less than 20
feet along Delaware River.
I
4045
top about 45;
base 65-100.
NEW JERSEY GEOLOGICAL SURVEY
30
3033
33
35
36
31
39