Superb slickenside - Sterling Hill, Ogdensburg, NJ

Description

An example of a superb slickenside! This is a neat example of geology in action. Here we have an awesome specimen showing a very well-developed slickenside. A slickenside is a smoothly polished surface caused by frictional movement between rocks along the fault's two sides. The polish seen throughout the front face of the slickenside is entirely natural. A close examination of the slickenside reveals the direction of movement or shearing along the fault. Much of the front face of the specimen has a very high natural polish. When viewed edge-on, the matrix reveals itself as a moderately rich zinc ore of smeared grains and small masses of black, metallic franklinite and smeared grains and sections of medium brown, dull lustered willemite. The remainder of the matrix consists of coarse white calcite. The specimen sits perfectly on one aide for the most optimal viewing. This specimen is a wonderful treat for a slickenside.
Dimensions are
11.8x15x5.8cm - 4¾x6x2¼in.
Please note the centimeter cube and inch bar for scale.
Weight in grams and ounces:
2944.5g - 103.86oz.
From the
Sterling mine, Ogdensburg, NJ.
The previous collection this specimen was in is
#114, Earl Verbeek.
#114 is the museum's Collection Sale number previously offered in the museum shop.
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All potential buyers need to be aware that being able to view fluorescent minerals requires an ultraviolet lamp. Most of the minerals from the Franklin and Sterling Hill zinc mining district fluoresce under
shortwave ultraviolet light
.
The shortwave wavelength is
254nm
or otherwise known as
UV C
. Always read the description carefully to determine if the main mineral of interest for a particular specimen will fluoresce.
ALL
fluorescent minerals depicted in our storefront are illuminated by two (2) 9 watt Triple short/mid/longwave AC Model 9SM-110 Way Too Cool LLC ultraviolet lamps, and the shortwave tubes and filters were replaced in late 2018.
There are several available brands and models of ultraviolet lights on eBay and other online sources. For further information on ultraviolet light and fluorescent minerals, copy and paste the following and go to >>>
geology.com/articles/fluorescent-minerals
.
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DISCLAIMER: Every reasonable effort was made to identify the mineral species noted in each specimen accurately. The occasional label from previous collection(s) may misidentify some species, and the current title and description here reflect the latest mineral species identification. There may or may not be any fluorescent mineral species present in this specimen. A fluorescent photograph may not have been included for several reasons. Chief among these are; there may not be any fluorescence in this particular specimen. If there are fluorescent species, it is considered minor and not the specific species of note in this particular specimen. Another reason not including a fluorescent photograph is that some mineral species may be too weak to record even with modern photographic technology and photo-enhancement. If such fluorescent species were present in this specimen, it would be noted in the descriptive text.
A modest effort was made to depict a fluorescent specimen accurately as possible.
In some cases, overexposure should be expected in select photographs to compensate for a fluorescent specimen's weak response.
All buyers should exercise safe viewing practices regarding the use of ultraviolet light. Visual dark adaption is highly recommended in the optimal viewing of fluorescent minerals. Buyers should also be aware of what type of lighting to view the specimens under. This can result in perceived differences of color and contrast due to color and contrast shifting under various kinds of lights available.
All photographs were taken with a Nikon D5300 digital camera with a Nikon DX AF-S 18-55mm lens attached with a UV filter. Lighting was done with a pair of OSRAM 8.5 watt LED A19 5000K 800 lumens bulbs in brushed aluminum reflectors. The photographs were processed on a color-calibrated flat panel monitor. Do note the Imperial measurement conversion is the nearest equivalent to the listed metric measurement.
--- All photographs appearing on this listing or any other Franklin Mineral Museum listing are the property of the Franklin Mineral Museum. Photographs
can be used strictly for personal use onl
y
. Otherwise, the photographs posted here are protected by U.S. Copyright Laws. They are not to be downloaded or reproduced for public use or distribution in any way without the written permission of the Franklin Mineral Museum. ---