[Rockhounds] Winter Blah's Pop Quiz - What Was The Last Specimen Added To Your Collection?

[Jeffrey T. Cessna]

Nate,

Glad to hear it. I think they all were good jumping off places for 
random web walking.

Jeff

At 12:27 PM 2/6/2009, you wrote:
>Jeff,
>Thanks for the links regarding the Leesburg formation.  I really enjoyed
>them.
>Nate Martin
>
>On Fri, Feb 6, 2009 at 11:01 AM, Jeffrey T. Cessna <jcessna at nist.gov> wrote:
>
> > At 10:29 PM 2/5/2009, you wrote:
> >
> >        What Was The Last Specimen Added To Your Collection?
> >>
> >
> > Purchased:
> >
> > Willemite Zn2(SiO4) fl green SW/LW
> > Sphalerite (Zn,Fe)S  fl,ph yellow ?W
> > Calcite-(Mn) CaCO3 fl red SW
> > Hasselhojden, Grythyttan, Sweden
> > Size: 6.5x4x4 cm (144g)
> >
> > It is still in the mail, from sweden, but I have really enjoyed the other
> > fluorescents I have purchased from Kjell Gatedal (unsolicited endorsement)
> > on eBay.
> >
> > Collected (31 jan 09):
> >
> > Potomac Marble (limestone conglomerate)
> > Leesburg Member, Balls Bluff Siltstone
> > Rt 15 N of Leesburg, Loudoun Co., Virginia
> >
> > I collected several pieces, chosen for either interesting constituents or
> > interesting patterns. I put down the piece with the intact 6 cm feldspar
> > crystal and couldn't find it again. Often the stones making up the
> > conglomerate are themselves pieces of weathered conglomerate. I 
> found a 30 x
> > 10 x 2.5 cm piece with half of one face covered with small milky quartz
> > crystals from a later vein filling. If you can bring yourself to cut it, it
> > will take a very nice polish. I have included a few links with more
> > information.
> >
> > http://www.mcmullans.org/geoweb/BasicPageListing/leesburg_member.htm
> >
> > http://pubs.usgs.gov/gip/stones/stones3.html
> >
> > pictures
> > 
> http://www.nvcc.edu/home/cbentley/geoblog/2008/05/western-conglomerates-culpeper-basin.html
> >
> >
> > Cheers,
> > Jeff
> >
> >
>
>
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