Jenny Jump Mountain, Warren County, New Jersey, USA

This is a magnification of a vug about 2 cm across. The axinite crystals are 2-3 mm. I found this in a vein of pegmatite composed of cream colored feldspar, that was exposed in the talus. Green needles of actinolite were associated in the pegmatite vugs.

© Collection of Fred Schuster

I collected this on the North east end of Jenny Jump mountain in the summer of 2003. The specimen was found in breaking open a vuggy vein of pegmatite, laying exposed in the hill's talus. This is a magnified view and the field of view is appoximately 2x3 cm.

I went on a quick trip to the Jenny Jump State Park area last weekend after reading about it in MinDat. I found several specimens of this mineral which appears to be Tremolite. Size: 4" X 2"

© gary moldovany

This is a magnification of a vug about 2 cm across. The axinite crystals are 2-3 mm. I found this in a vein of pegmatite composed of cream colored feldspar, that was exposed in the talus. Green needles of actinolite were associated in the pegmatite vugs.

This is a larger specimen of Tremolite I found last weekend near Jenny Jump. Size: 4" x 5"

This was the only good/intact specimen of axinite-Fe that I managed to find after pounding through some pale feldspar collected near Ghost Lake in Jenny Jump State Park, near Hackettstown, New Jersey. The thumbnail specimen I mounted was mainly feldspar (albite?) with a 5 mm cavity that contained axinite crystals of ~2.0 mm and bundles of ...

I collected in the talus exposures of the Northeast end of Jenny Jump Mountain during the summer of 2003, in the woods just to the right of the Lake (west). There is Franklin marble, serpentine and other Precambrian rock exposed in this area.

© Fred Schuster

A nearly impossible to find cave(not to be confused with the Fairy Hole Cave) near Ghost Lake on Shades of Death Road. There are two very tight Limestone caverns. And I was pleased not to discover any hibernating animals during my exploration. February of 2012.

© 2012 David S. Bernstein

For quite some time, this adit was open. Mud and other debris from above have sealed it up. May of 2010.

© 2009 David S. Bernstein

A Limestone cavern located on the shore of Ghost Lake. June of 2011.

© 2011 David S. Bernstein

I had been looking for this old iron mine for years with its allure of secondary copper mineralization. Two weeks ago I finally found it. Within two minutes of my arrival, a rather severe storm rolled in giving me a bone to pick with the weatherman who called for "just a chance of a spot shower." Thankfully, I don't hike anywhere without foul ...

© 2009 David S. Bernstein

This is a photo of the cliff face where I found the Tremolite deposit. If you look closely, you can see the wood-grain like texture of the veins running up and down the rock.

A nearly impossible to find cave(not to be confused with the Fairy Hole Cave) near Ghost Lake on Shades of Death Road. There are two very tight Limestone caverns. And I was pleased not to discover any hibernating animals during my exploration.

© 2012 David S. Bernstein

Been looking for this one for a long time. A friend and I almost walked by it. Unknown if silver was found here. February of 2012.

© 2012 David S. Bernstein

The Jenny Jump area is full of abandoned mines,pegmatites,some alpine cleft mineraliztion and scattered outcrops of marble. Even if you don't find anything, it is a great place to explore. July of 2010.

© 2009 David S. Bernstein

I came upon this mine accidentally, the result of walking down the wrong trail. It is one of the few places where Rhodonite has been reported in the State of New Jersey. I would have loved to pick through the rock and find some but the mosquitos were some of the worst I have ever encountered. July of 2011. At least I know where to return to.

© 2011 David S. Bernstein

The dumps surrounding this shaft contain a variety of interesting minerals-unusual for a New Jersey Iron Mine. Quite a hike is required to access this area. May of 2010.

© 2009 David S. Bernstein

It was called a mine but really it was just a test pit. Located near the Davis Mine, the tailings and the test pit, is very easy to miss. July of 2011.

© 2011 David S. Bernstein

The Stinson Mine is located on land previously used for farming. Seen is the remains of an old tractor.

© 2011 David S. Bernstein

Many of the mines on Jenny Jump are in deposits of white crystalline Limestone. But there are huge blocks of blue Limestone scattered throughout the forest. I have read that this Limestone is younger then the white Limestone.

© 2011 David S. Bernstein

According to an old report, beautiful pink crystalline limestone was quarried at this location in the early 1900s. Unfortunately, the pit has been completely filled in. So complete was the backfilling that it is hard to imagine where the pit even was. February of 2012.

© 2012 David S. Bernstein

Fairy Hole contains some inaccessible vertical pipes.

© 2011 David S. Bernstein

A friend and I decided to meet and do some mine exploration. He knew of one mine on Jenny Jump and I knew of another. Turned out it was the same mine, this one! But we did find some workings that were new to both of us nearby.

© 2012 David S. Bernstein

We tried to measure the depth of the shaft but were unsuccessful.

© 2012 David S. Bernstein

One of the most famous "weird" roads in New Jersey, Ghost Lake is located on Shades of Death Road.

© 2011 David S. Bernstein

The pit had several feet of soupy mud. A piece of mine cable can be seen.

© 2012 David S. Bernstein

A view down. February of 2012.

© 2012 David S. Bernstein

This pit is now just a shallow depression next to a hiking trail.

© 2011 David S. Bernstein

At the top of JJ looking east towards the sod farms of Great Meadows.

© 2011 David S. Bernstein

According to an old report, beautiful pink crystalline limestone was quarried at this location in the early 1900s. Unfortunately, the pit has been completely filled in. So complete was the backfilling that it is hard to imagine where the pit even was. February of 2012.

© 2012 David S. Bernstein

The copper minerals seem to only be found near the large shaft. All other workings, like this one, contain lean magnetite.

© 2012 David S. Bernstein

A nearly impossible to find cave(not to be confused with the Fairy Hole Cave) near Ghost Lake on Shades of Death Road. There are two very tight Limestone caverns. And I was pleased not to discover any hibernating animals during my exploration.

© 2012 David S. Bernstein

A chunk of weakly radioactive pegmatite along the trail to Ghost Lake. For comparison, background radiation is about 20 cpm and a ~7mm uraninite crystal tops out around 3500 cpm on this Geiger counter.