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GeneralNJ Crystal Cavities PDF?

2nd Nov 2013 01:02 UTCRonnie Van Dommelen 🌟 Manager

Hi All,

I'm looking for a copy of USGS Bulletin 832, Crystal Cavities of the New Jersey Zeolite Region, Waldemar Schaller, 1932.

There is a copy on the web (Google scan), but the right side of many pages is chopped off. We also don't have a copy of this in our local libraries. I would love to have a complete copy if anybody has a PDF of it.

Thanks,

Ronnie

2nd Apr 2017 21:19 UTCMichael Ronayne

Ronnie,

I was looking for the same document as well. I found a Google copy, contained in a larger document of 784 pages and as you noted the quality was poor. With the correct title page I then found a clean copy of 136 pages at the University of North Texas Digital Library which can be downloaded via the following URL’s:

Full URL:

https://digital.library.unt.edu/ark:/67531/metadc304217/

Email Friendly Google Shortened URL:

https://goo.gl/Kg8mcO

There is one problem with the PDF at UNT.edu; it is 73MB in size. The Google monster of 784 pages in only 42MB is size, damaged pages and all. When I am downloaded very large PDF, I generally use my IE browser to download the PDF image to my hard drive and then use Adobe Acrobat Reader, to read the PDF locally. Don’t try read PDF’s of this size online. I am retired now, but when I was working I had a full function copy of Adobe Acrobat which would have optimized the PDF down to a more reasonable size.

The PDF appears to have a reasonably decent OCR scan so you can run text searches. I was disappointed that no mention was made of “Pillow Lava”. Many times, in the Watchung Range, crystals are associated with “Pillow Lava”. The formations in some of the photographs are identified as “spheroidal structures”. Page 9 had this most interesting reference:

"Plate 2,A, illustrates the condition and appearance of a lava flow that came to rest quietly over dry sediments and crystallized to a normal compact basalt. Plate 2,B, shows the somewhat similar conditions to be seen at the base of a great sill. In Plate 3, however, the lava illustrated flowed into water and acquired a spheroidal or boulderlike structure. Excellent illustrations of the boulderlike structure are also shown by Lewis and by Fenner. The outside of each bouldery mass solidified to basaltic glass, but the inside crystallized to normal basalt. In some places the development of the spheroidal phase with much basaltic glass extended only part way upward in the lava. The higher parts there crystallized to dense uniform trap rock similar to that shown in Plate 2. The occurrence together of these two types of volcanic rock is shown in Plate 3,B; the crystal cavities appear only in the lower spheroidal phase."

It looks like this author was not using the same nomenclature, which is now in current use. Note the last line as to where the crystals are to be found!

Have you been able to make a trip to New Jersey?

Best Regards,

Michael Ronayne

11th Apr 2017 00:55 UTCRonnie Van Dommelen 🌟 Manager

Michael,

Thanks for the information! I've since found a used paper copy that I purchased.

I have not collected in New Jersey.

Ronnie

11th Apr 2017 19:55 UTCJolyon Ralph Founder

Why not download a good quality PDF of this direct from the USGS?

https://pubs.er.usgs.gov/publication/b832

11th Apr 2017 20:01 UTCRonnie Van Dommelen 🌟 Manager

There are certain topics that I routinely/repeatedly search on the web. Over the last few years there has been a tremendous increase in old literature available. It is fantastic to sit at home and look up old papers that used to require a library visit AND you can search them and sometimes copy/paste sections into a translator.

Now I sound old....but it is amazing.

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