83


U


black clay.
20


(C


dark green marl and shells.
17


a


light greensand and marl.
816 ^^ whole depth.
Winslow is about twelve miles southeast of Clementon, where
the nearest marl pits are opened. The elevation of Winslow or
Clementon is not ascertained. Longacoming, lying between
them, is 180 feet above tide, and is hi^^er than either of the
other places. The fact is interesting, as proving the descent of
the marl towards the southeast for a great distance, and if the
two places should be upon the same level, it would show that
the rate of descent is nearly the same as in the beds, when near
the surface.
61

As many meamueme&ts of the marl stratam as poisibltlMvra
been taken and reoorded. There is only one section at preseid»<
Icnown in the State, where one of the marl beds can be seen in
its fnll thickness — and that is in the Highlands on the shore of
Sandy Hook bay, where the first bed can be seen with the bed
of clay below, and that of sand above. At most places where
marl is dug, the pits are in fields, or banks of streams, and the
upper part of the marl has been changed by th J action of air
and moisture, so that is not recognised ; and at the bottom,
water, caving in of pits, or other causes, hinder the workmen, so
iiiat they rarely observe the exact termination of the marl.
This makes it difficult to find out the thickness of the layer.
