Image from the Biodiversity Heritage Library.
Contributed by Yale Peabody Museum of Natural History.
| www.biodiversitylibrary.org
Transcription
To Millburn via Gregory and Wyoming Avenues- Gap in First
Mountain- Corresponding gap in Second Mountain filled by Moraine.
These gaps mark pre-glacial course of the upper Passaic and
Rockaway Rivers.
To Springfield- Church of Revolutionary fame. - To Union,
Roselle, Wheatsheaf and Woodbridge. Perth Amboy for night.
Note on Trias of New Jersey
Triassic formation in New Jersey consists of a great thick-
ess of red shale, arkosic sandstone, (some beds conglomerat.)
dark colored argillite, and three thick sheets of interbedded
extrusive basalt. Each of the latter was formed by several flows
closely following each other. Near the base of the series is an
intrusive sill of diabase which forms the Palisades along the
Hudson. The sediments were mainly fluvatile, accumulated in an
intermountain valley, under arid conditions. From the top down-
ward they have been grouped into the (a) Brunswick shales (b)
Lockatong argillite (c) Stockton sandstone. Along the northwest
border are local deposits of very coarse conglomerates- the
alluvial fans of snow-fed rivers debouching from canyons in the
mountains. In the northeastern part of the State only the
Brunswick beds are recognized. The Stockton and Lockatong beds
are best seen near the Delaware, where profound faulting repeats
the series twice. The igneous rocks form conspicuous ridges,
the crests of which form a part of the dissected Schooley Mountain
penesplain. The sedimentary rocks underlie rolling lowlands,
remnants of two base-levels, developed in Tertiary time, the lower
of which (Somerville peneplain) was widely covered with stream
deposits in early Pleistocene. These have been since almost
entirely removed and the present dissection accomplished.
THURSDAY
Note on Cretaceous of New Jersey
In New Jersey the Cretaceous consists of the
Manasquan marl
25 feet
Ranococas group
Vincentown sand
25-70 feet
Hornerstown marl
39 feet
Mohnmouth group
Redbank sand and Tinton sand member 0-100 "
Navesink marl
25-40 feet
Mount Laurel sand
5-60 "
Matawan group
Wenonah sand
20-35 feet
Marshalltown formation
30-35 feet
Englishtown sand
20-100 "
Woodbury clay
50 feet
Merchantville clay
63 feet