2000 Appalachian Tectonic Studies Group Field Trip
Structures in the central part of the Newark basin, Pennsylvania and New Jersey
Roy Schlische and Martha Withjack, Rutgers University
Gregory Herman, New Jersey Geological Survey
The 2000 ATSG Field Trip was held on May 20 and 21, 2000.
We examined core from the deep-coring project in the Newark
basin and mesostructures in Late Triassic and Early Jurassic
bedrock in the central part of the basin in eastern Pennsylvania
and western New Jersey.
Click on an image to enlarge it.
The trip focused on the large-scale geometry of the basin (as
revealed by map, drill hole, and seismic data), the timing of
sedimentation with respect to deformation, the tectonostratigraphic
development of the basin, the geometry and structural/hydrologic
significance of small-scale faults, joints, and veins, and evidence
for basin inversion.
Day 1 Stops:
1) Monroe, PA: outvrops of synfrift Passaic Formation on
immediate hanging wall side of border fault and prerift rocks
on immediate FW side
2) Haycock Mountina, PA: outcrops of synrift Passaic Fortmation
cut by numerous small normal faults and the relationship between
fault displacement and fault-zone width
3) H&K Quarry: outcrops of synrift Lockatong Fm cut by large
4) Stockton, NJ: outcrops of synrift Stockton Fm. showing
systematic,orthogonal joint sets
Day 2 Stops:
1) Dilts Corner, NJ along Route 202: outcrops of Passaic Fm.
hornfels showing late-stage kink folds along the southern end
of the Flemington fault system
2) Mine Brook Park, Flemington, NJ: outcrops of uppermost
Passaic Fm and overlying base of the Orange Mt. basalt cut
and brecciated by faults of the Flemington fault system,
carbonate-filled fissures/veins, and right-lateral shear zones.
3) Pennington, NJ: outvrops of Passaic Fm. shoing progressive
strain associated with overlapping and cross-cutting tectonic veins
Roy Schlische and Martha Withjack
New Jersey Geological Survey