[meteorite-list] Re: [MeteoriticalBulletin] Meteoritical Bulletin: Announcement 87-5
From: MeteorHntr_at_aol.com <MeteorHntr_at_meteoritecentral.com>
Date: Thu Apr 22 10:25:36 2004 Message-ID: <152.1efcfab3.2be93f76_at_aol.com> --part1_152.1efcfab3.2be93f76_boundary Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: quoted-printable Hello Jeff and List, I just noticed in the Meteoritical Bulletin (below) that Park Forest is=20 offically classifed as an "L5" and not as an "L5 impact melt breccia." Can that change in the future? By the way, 5 years later is Portales Valley still just an "Ordinary H5" or=20 has it ever been changed? =20 Steve Arnold THE METEORITICAL BULLETIN E-mail Announcement 87-5, May 6, 2003 =20 Park Forest 41=B029'05" N, 87=B040'45" W Cook County, Illinois, USA Fell 2003 March 26, approx. 23:50 hrs Ordinary chondrite (L5) A bright fireball was seen by numerous observers in parts of=20 Illinois, Indiana, Wisconsin and Ohio around midnight of March 26,=20 2003. Numerous stones fell, mostly concentrated in the area of the=20 village of Park Forest. At least two houses in Park Forest were=20 struck, as was the Fire Station. Dozens of other stones or fragments=20 of stones were recovered in the area in the hours and days following=20 the fall. Total mass recovered is more than 18 kg, largest stone ~ 3=20 kg in possession of finder. Description and classification (S. Simon,=20 UChi; M. Wadwha, FMNH; P. Sipiera, PSF): Most stones are partly to=20 fully fusion crusted. Some broken faces show brecciated texture,=20 angular clasts. Cross-cutting dark veins and dark pockets may be of=20 impact melt origin. No visible chondrules in hand sample. Abundant=20 troilite and metal visible in some broken faces. Chondrules and=20 maskelynite are visible in thin section. Classified as an L5=20 chondrite: mean olivine composition Fa24.7, mean low-Ca pyroxene=20 Fs20.7Wo1.6. Shock stage S5. Specimens: type specimen 545g (hit fire=20 station), FMNH. Other stones at FMNH: 1200g, 529g, 183g, 159g, 125g. --part1_152.1efcfab3.2be93f76_boundary Content-Type: text/html; charset="ISO-8859-1" Content-Transfer-Encoding: quoted-printable <HTML><FONT FACE=3Darial,helvetica><FONT SIZE=3D2 FAMILY=3D"SANSSERIF" FACE= =3D"Arial" LANG=3D"0"><BR> Hello Jeff and List,<BR> <BR> I just noticed in the Meteoritical Bulletin (below) that Park Forest is offi= cally classifed as an "L5" and not as an "L5 impact melt breccia."<BR> <BR> Can that change in the future?<BR> <BR> By the way, 5 years later is Portales Valley still just an "Ordinary H5" or=20= has it ever been changed? <BR> <BR> Steve Arnold<BR> <BR> <BR> <BR> &nbs= p; THE METEORITICAL BULLETIN<BR> &nbs= p; E-mail Announcement 87-5, May 6, 2003<BR> &nbs= p; <BR> Park Forest 41=B029'05" N, 87=B040'45" W<BR> Cook County, Illinois, USA<BR> Fell 2003 March 26, approx. 23:50 hrs<BR> Ordinary chondrite (L5)<BR> A bright fireball was seen by numerous observers in parts of <BR> Illinois, Indiana, Wisconsin and Ohio around midnight of March 26, <BR> 2003. Numerous stones fell, mostly concentrated in the area of the <BR> village of Park Forest. At least two houses in Park Forest were <BR> struck, as was the Fire Station. Dozens of other stones or fragments <BR> of stones were recovered in the area in the hours and days following <BR> the fall. Total mass recovered is more than 18 kg, largest stone ~ 3 <BR> kg in possession of finder. Description and classification (S. Simon, <BR> UChi; M. Wadwha, FMNH; P. Sipiera, PSF): Most stones are partly to <BR> fully fusion crusted. Some broken faces show brecciated texture, <BR> angular clasts. Cross-cutting dark veins and dark pockets may be of <BR> impact melt origin. No visible chondrules in hand sample. Abundant <BR> troilite and metal visible in some broken faces. Chondrules and <BR> maskelynite are visible in thin section. Classified as an L5 <BR> chondrite: mean olivine composition Fa24.7, mean low-Ca pyroxene <BR> Fs20.7Wo1.6. Shock stage S5. Specimens: type specimen 545g (hit fire <BR> station), FMNH. Other stones at FMNH: 1200g, 529g, 183g, 159g, 125g.<BR> </FONT></HTML> --part1_152.1efcfab3.2be93f76_boundary-- Received on Tue 06 May 2003 12:40:22 PM PDT |
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