188:
38:
378:
as a whole. 433 Eros has been found to have a similar spectrum, while several pieces of circumstantial evidence for the Flora family exist: (1) the Flora family is thought to have formed about 1,000 to 500 million years ago; (2) the Flora family lies in a region of the
517:
A zircon UâPb date of 467.50±0.28âMa from a distinct bed within the meteorite-bearing interval of southern Sweden that, combined with published cosmic-ray exposure ages of co-occurring meteoritic material, provides a precise age for the L chondrite breakup at
337:
million years ago. Compared to other chondrites, a large proportion of the L chondrites have been heavily shocked, which is taken to imply that the parent body was catastrophically disrupted by a large impact. This impact has been
308:
6 dominates, with over 60% of the L chondrites falling into this class. This indicates that the parent body was sizeable enough (greater than 100 kilometres (62 mi) in diameter) to experience strong heating.
213:, accounting for approximately 35% of all those catalogued, and 40% of the ordinary chondrites. The ordinary chondrites are thought to have originated from three parent asteroids, with the fragments making up the
621:
420:
260:
content (Fa) in olivine of 21 to 25 mol%. About 4â10% ironânickel is found as a free metal, making these meteorites magnetic, but not as strongly as the
339:
1336:
1285:
652:
726:
602:
1353:
618:
599:
424:
1358:
539:"An extraterrestrial trigger for the mid-Ordovician ice age: Dust from the break-up of the L-chondrite parent body"
104:
85:
73:
51:
28:
779:
587:
Meteorite, asteroidal, and theoretical constraints on the 500-Ma disruption of the L chondrite parent body
1341:
1165:
63:
600:"L-chondrite asteroid breakup tied to Ordovician meteorite shower by multiple isochron 40Ar-39Ar dating"
1290:
1280:
1069:
1064:
765:
1432:
1348:
774:
702:
445:
NASA (YouTube) â Dr. David Kring â Asteroid
Initiative Workshop Cosmic Explorations Speakers Session
1002:
770:
761:
751:
645:
391:
meteorites; and (4) the Flora family parent body was over 100 kilometres (62 mi) in diameter.
1310:
1059:
682:
400:
326:
318:
796:
471:"Refined Ordovician timescale reveals no link between asteroid breakup and biodiversification"
469:
Lindskog, A.; Costa, M. M.; Rasmussen, C.M.Ă.; Connelly, J. N.; Eriksson, M. E. (2017-01-24).
233:
Their name comes from their relatively low iron abundance (less than 10%) with respect to the
1248:
1218:
1025:
1020:
939:
285:
145:
1258:
1155:
1137:
891:
444:
383:
that contributes strongly to the meteorite flux at Earth; (3) the Flora family consists of
845:
8:
1160:
872:
832:
638:
736:
1253:
1105:
850:
563:
538:
503:
470:
366:
The parent body/bodies for this group are not known, but plausible suggestions include
322:
206:
78:
305:
1411:
1379:
1052:
1012:
719:
568:
508:
490:
1037:
558:
550:
498:
482:
1273:
1094:
1047:
984:
914:
625:
384:
168:
1083:
992:
909:
731:
714:
687:
181:
L chondrite meteorites, Hypersthene chondrites, Olivine hypersthene chondrites
1426:
1399:
1305:
1295:
1127:
1110:
957:
630:
494:
380:
281:
141:
1389:
1145:
1032:
997:
865:
807:
707:
572:
554:
512:
375:
222:
118:
1317:
1213:
1197:
1192:
899:
855:
741:
665:
277:
261:
234:
214:
137:
486:
457:
The Flora Family: A Case of the
Dynamically Dispersed Collisional Swarm?
1232:
904:
882:
301:
161:
759:
1406:
1268:
1237:
1150:
972:
962:
929:
919:
788:
697:
673:
661:
388:
210:
56:
187:
1374:
1042:
924:
367:
350:
million years ago. Earlier argon dating placed the event at around
297:
293:
289:
257:
157:
153:
149:
133:
110:
37:
1187:
967:
952:
947:
371:
273:
129:
114:
1394:
692:
468:
1384:
317:
Many of the L chondrite meteors may have their origin in the
248:
for the dominant minerals, but these terms are now obsolete.
1424:
240:Historically, the L chondrites have been named
660:
646:
421:"Natural History Museum, meteorite catalogue"
537:Schmitz, Birger; et al. (2019-09-18).
653:
639:
387:, whose composition is similar to that of
312:
36:
562:
502:
237:, which are about 20â25% iron by weight.
536:
462:
251:
1425:
634:
209:are the second most common group of
603:Meteoritics & Planetary Science
13:
589:, Icarus, Vol. 119, p. 182 (1996).
459:, Icarus, Vol. 157, p. 155 (2002).
14:
1444:
612:
186:
272:The most abundant minerals are
592:
579:
530:
449:
438:
413:
361:
246:olivine hypersthene chondrites
1:
406:
340:dated via cosmic ray exposure
267:
605:42, 1, pp. 3â150, Jan. 2007.
7:
619:The Catalogue of Meteorites
394:
10:
1449:
1291:extraterrestrial materials
1367:
1326:
1231:
1206:
1180:
1136:
1082:
1011:
983:
938:
890:
881:
787:
750:
672:
185:
177:
167:
125:
103:
84:
72:
64:Structural classification
62:
50:
35:
26:
21:
304:occur in minor amounts.
136:(Fa) of 21 to 25 mol%),
1070:Meteorites on Mars list
1065:Martian meteorites list
401:Glossary of meteoritics
319:Ordovician meteor event
313:Ordovician meteor event
228:
555:10.1126/sciadv.aax4184
256:Characteristic is the
242:hypersthene chondrites
1219:Nonmagmatic meteorite
598:Korochantseva et al.
475:Nature Communications
225:groups respectively.
1286:CaâAl-rich inclusion
252:Chemical composition
487:10.1038/ncomms14066
455:D. NesvornĂœ et al.
358:million years ago.
207:ordinary chondrites
45:, an L4-6 chondrite
624:2006-05-03 at the
323:radioisotope dated
79:Ordinary chondrite
1420:
1419:
1412:Near-Earth object
1380:Atmospheric entry
1227:
1226:
1176:
1175:
1078:
1077:
329:method at around
200:
199:
195:, an L6 chondrite
178:Alternative names
16:Type of meteorite
1440:
1433:Meteorite groups
1245:Characteristics
1021:Basaltic Breccia
888:
887:
785:
784:
757:
756:
655:
648:
641:
632:
631:
606:
596:
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585:H. Haack et al.
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543:Science Advances
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528:
527:
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506:
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460:
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447:
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432:
423:. Archived from
417:
385:S-type asteroids
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355:
349:
347:
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334:
190:
132:(characteristic
40:
19:
18:
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1423:
1422:
1421:
1416:
1363:
1322:
1235:
1223:
1202:
1172:
1132:
1074:
1048:Orthopyroxenite
1007:
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659:
626:Wayback Machine
615:
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549:(9): eaax4184.
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306:Petrologic type
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169:Petrologic type
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11:
5:
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1333:Meteorites by
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1210:
1208:
1207:Obsolete terms
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1203:
1201:
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1184:
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1035:
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1006:
1005:
1000:
995:
993:Impact breccia
989:
987:
981:
980:
978:
977:
976:
975:
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965:
955:
950:
944:
942:
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932:
927:
922:
917:
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869:
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842:
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838:
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829:
828:
825:
822:
819:
816:
813:
810:
805:
802:
793:
791:
782:
754:
752:Classification
748:
747:
745:
744:
739:
734:
732:Micrometeorite
729:
724:
723:
722:
712:
711:
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700:
695:
685:
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670:
669:
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613:External links
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411:
410:
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296:, sodium-rich
284:), as well as
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1360:
1359:Organizations
1357:
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1337:find location
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1332:
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1325:
1319:
1316:
1312:
1311:WidmanstÀtten
1309:
1307:
1306:Neumann lines
1304:
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1297:
1296:meteoric iron
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1161:Eagle Station
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427:on 2006-05-03
426:
422:
416:
412:
402:
399:
398:
392:
390:
386:
382:
381:asteroid belt
377:
373:
369:
359:
341:
328:
324:
320:
310:
307:
303:
299:
295:
291:
287:
283:
282:orthopyroxene
279:
275:
265:
263:
259:
249:
247:
243:
238:
236:
226:
224:
220:
216:
212:
208:
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194:
189:
184:
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176:
172:
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166:
163:
159:
155:
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147:
143:
142:orthopyroxene
139:
135:
131:
128:
124:
120:
116:
112:
108:
106:
102:
95:
92:
91:
89:
87:
83:
80:
77:
75:
71:
67:
65:
61:
58:
55:
53:
49:
44:
39:
34:
31: —
30:
27:—
25:
20:
1390:Impact event
1371:
1146:Mesosiderite
1060:Shergottites
1033:Chassignites
998:Mare basalts
860:
797:Carbonaceous
708:strewn field
594:
586:
581:
546:
542:
532:
516:
478:
474:
464:
456:
451:
440:
429:. Retrieved
425:the original
415:
376:Flora family
365:
327:uranium-lead
316:
300:and calcium
271:
262:H chondrites
255:
245:
241:
239:
235:H chondrites
232:
223:LL chondrite
218:
203:
201:
192:
119:Flora family
42:
1318:CI1 fossils
1214:Amphoterite
1198:Octahedrite
1193:Hexahedrite
900:Acapulcoite
827:C ungrouped
742:Parent body
666:meteoritics
524:0.3 Ma
362:Parent body
286:ironânickel
278:hypersthene
219:L chondrite
215:H chondrite
173:6 (>60%)
146:ironânickel
138:hypersthene
126:Composition
105:Parent body
22:L chondrite
1259:weathering
1233:Mineralogy
1181:Structural
1156:Main group
1138:Stony-iron
940:Asteroidal
905:Brachinite
883:Achondrite
703:statistics
662:Meteorites
431:2005-12-18
407:References
342:at around
302:phosphates
268:Mineralogy
211:meteorites
162:phosphates
156:, Na-rich
121:as a whole
1407:Meteoroid
1372:See also:
1302:Patterns
1269:chondrule
1238:petrology
1151:Pallasite
1043:Nakhlites
973:Howardite
963:Diogenite
930:Winonaite
920:Lodranite
892:Primitive
846:Kakangari
833:Enstatite
789:Chondrite
698:impactite
674:Meteorite
495:2041-1723
481:: 14066.
389:chondrite
374:, or the
109:Possibly
86:Subgroups
57:Chondrite
1427:Category
1375:Asteroid
1354:Journals
1281:Minerals
1274:presolar
1166:Pyroxene
1053:ALH84001
1026:NWA 7034
925:Ureilite
873:Rumuruti
851:Ordinary
780:grouplet
683:Glossary
622:Archived
573:31555741
513:28117834
395:See also
368:433 Eros
298:feldspar
294:Chromite
290:troilite
258:fayalite
158:feldspar
154:chromite
150:troilite
134:fayalite
111:433 Eros
1265:Grains
1188:Ataxite
1013:Martian
968:Eucrite
953:Aubrite
948:Angrite
737:Notable
727:Largest
720:hunting
564:6750910
504:5286199
372:8 Flora
274:olivine
193:Walters
148:4â10%,
130:Olivine
117:or the
115:8 Flora
43:NWA 869
1400:shower
1395:Meteor
1349:Awards
1038:Kaidun
693:bolide
571:
561:
511:
501:
493:
331:467.50
204:L type
1385:Comet
1327:Lists
1249:shock
1115:IIIAB
985:Lunar
915:IIICD
775:group
766:class
520:468.0
344:468.0
325:with
160:, Ca-
74:Class
29:Group
1342:type
1236:and
1121:IIIF
1118:IIIE
1095:IIAB
1084:Iron
1003:List
778:and
771:clan
762:type
715:Find
688:Fall
664:and
569:PMID
509:PMID
491:ISSN
370:and
335:0.28
288:and
280:(an
276:and
229:Name
221:and
202:The
140:(an
52:Type
1254:TKW
1128:IVB
1124:IVA
1111:IIG
1106:IIE
1102:IID
1099:IIC
958:HED
910:IAB
760:By
676:...
559:PMC
551:doi
499:PMC
483:doi
352:470
348:0.3
244:or
144:),
96:etc
1429::
1091:IC
866:LL
840:EL
837:EH
824:CV
821:CR
818:CO
815:CM
812:CK
808:CI
804:CH
801:CB
773:,
764:,
567:.
557:.
545:.
541:.
515:.
507:.
497:.
489:.
477:.
473:.
321:,
292:.
264:.
217:,
152:,
113:,
93:L3
861:L
856:H
768:,
654:e
647:t
640:v
575:.
553::
547:5
522:±
485::
479:8
434:.
356:6
354:±
346:±
333:±
68:?
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