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Unformatted text preview: nce lies a glacially-transported
Shawangunk boulder (fig. 20). The steep hillslope above stop 6
is covered with many boulders. Some of these were derived from
frost-shattered bedrock that lies just beneath the bouldery mantle.
Other boulders, based on their subrounded shape, have been
glacially transported. For those who are more adventurous, the
Steeny Kill Lake Trail provides a moderate hike down to the Steeny
Kill Lake moraine, ending on the north shore of the lake.
0.0 mi/2.9 mi
0.1 mi/3.0 mi
0.4 mi/3.4 mi From Stop 6 parking area, exit and turn
Turn right at yield sign.
Turn left into beach parking area. Park
and walk to Stop 7. Stop 7
Location - Port Jervis South
quadrangle, East shore of Lake
Marcia. Explanation - The rock rubble
(talus) that borders the east shore
of Lake Marcia consists of angular
Shawangunk boulders that were
dislodged from rock outcrops by
frost shattering, and over time
accumulated at the base of the
MARCIA KUSER RD Geology - Surficial – Talus. Bedrock
- Shawangunk Formation. TO
MONUMENT B E A C H STOP 7
ROOMS 0 200
feet TO 23 This stop is just east of boundary between the Shawangunk and
the Martinsburg Formations. The Martinsburg Formation forms
the core of an arch or anticline, and the Shawangunk Formation
overlies it. Erosion of the tougher rock of the Shawangunk
Formation exposed the softer and more easily eroded Martinsburg
Formation forming a small valley where the lake lies. 37 Other occurrences – Throughout the park, talus, made up chiefly
of boulders from the Shawangunk Formation, blankets the base of
cliffs and steep hillslopes.
0.0 mi/3.4 mi
0.4 mi/3.8 mi
0.1 mi/3.9 mi
0.4 mi/4.3 mi
0.1 mi/4.4 mi
2.3 mi/6.7 mi From Stop 7 parking area, exit and turn
Bear right onto NJ 23, follow sign to Port
Turn left, follow sign to Sawmill and
Park Ridge Roads.
Turn right onto Park Ridge Road.
Stop 8. Park on right beyond Shimers
Brook bridge. Stop 8
TO MON South 23 swamp RD 0.0 mile RK PA PARK
OFFICE N Geology – Surficial -Recessional
moraine, drumlins, and swamp
deposits. E G
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