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Peter Cristofono January 10, 2012 03:49AM
I'm curious, is there a more recent reference than Dale (1911) for aegirine occurring at this locality (or anywhere else in the New London Granite-gneiss)? I'm interested because this quarry and two other nearby localities are the only reported occurrences of aegirine in Connecticut.

Goldsmith (1961) sampled "aegirine-augite granitic gneiss" from this quarry and reported aegirine-augite, monazite, allanite and sphene. I can find no other reference for aegirine or aegirine-augite from Flat Rock.

Goldsmith, Richard et al (1961). Sphene in Granitic Gneisses of Southeastern Connecticut (USGS Prof Paper 424-A).

Edited 1 time(s). Last edit at 01/10/2012 04:41PM by Peter Cristofono.
Rowan Lytle January 12, 2012 09:14PM
I've looked all over for more about this area, but found nothing.
I have, however, seen some aegrine in nearby outcroppings.

-Rowan Lytle

Food, Water, Shelter, Fire, Minerals.
Harold Moritz (2) January 25, 2012 02:26AM
By WWI, the use of bldg and paving stone was rapidly declining in favor of concrete and asphalt, so not long after Dale and Gregory (1911) no one cared much about the granite resource anymore. The Avalonian terrane of SE and eastern Conn is not a mineral hotbed either. Schairer's 1931 mentions aeschynite from the Flatrock Quarry and Sohon's 1951 Minerals of Conn. mentions acmite coming from Waterford. These documents are generally not primary sources in any case, but the latter has a great reference list. Otherwise, I havent seen anything.
Rachel Cesana February 13, 2012 12:16AM
I just came across an old book called "the Commercial Granites of New England". The only quarry listed for Waterford that contains aigerite granite was called by the name of "Scott Quarry". This book was printed in 1923 by the USGS. Perhaps this is the quarry you are looking for but by '23 was under a new name. All the other quarries listed for Waterford were associated with the gray granites of Westerly RI. Just got this book from a friend of our RI club for our library and decided to take it home to look at it yesterday!! Your good luck if it turns out to be the same place.

Good Hunting
Michael Kieron February 13, 2012 01:52AM

The Flat Rock and Scott quarries were separate operations. Flat Rock was among the larger quarries along with the Millstone and Booth quarries and operated until the 1940s. Scott was a small quarry and defunct prior to 1930.

-Mike K.
Harold Moritz (2) February 13, 2012 03:41PM
Is the author of "The Commercial Granites of New England" one of the same authors of "The Granites of Connecticut" (T. Nelson Dale and Herbert E. Gregory)? I have the latter but not the former, though I'd heard of it.
Rachel Cesana February 21, 2012 10:37PM

book is written by T.Nelson Hale, United States Geological Survey, Bulletin 738

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