421:
393:
428:
400:
282:
450:
548:
thickening towards
Wenlock Edge. The type section of the formation was defined by Barrett in 1989 along the left (north) bank of Hughley Brook, 200 metres (660 ft) southeast of Leasows Farm and 500 metres (1,600 ft) northeast of Hughley Church. The formation has provided fossils of
536:
with a 1 metre (3.3 ft) thick transition in colour and upward decrease in number of hard siltstone beds. The top of the
Buildwas Formation shows a gradational increase in thickness of beds and a number of limestone beds, where it grades into the overlying
531:
with shell fragments present throughout. The basal part of the formation consists of grey-green rubbly mudstones, containing comminuted shell debris and overlies the mottled green, grey and purple mudstones of the
619:
Bassett, M G, 1989. The
Wenlock Series in the Wenlock area. 51-73 in "A global standard for the Silurian System". Holland, C H and Bassett, M G, (editors). National Museum of Wales, Gelogical series No.9,
564:
649:
689:
633:
Cocks, L R M, Holland, C H, Rickards, R B and
Strachan, I, 1971. A correlation of Silurian rocks in the British Isles. Geological Society of London, Special Report No.1.
420:
654:
636:
Butler, A J, 1937. On
Silurian and Cambrian rocks encountered in a deep boring at Walsall, South Staffordshire, Geological Magazine, 74, 241-257.
392:
630:
Basset, M G, 1974. Review of the stratigraphy of the
Wenlock Series of the Welsh Borderlands and South Wales. Palaeontology, 17, 745-777.
659:
694:
354:
600:
684:
679:
544:
The thickness of the formation ranges from 22 to 40 metres (72 to 131 ft), with the thinnest outcrops occurring near
674:
347:
188:
234:
195:
664:
589:
123:
538:
133:
699:
669:
533:
143:
482:
501:
227:
643:
551:
509:
73:
31:
585:
525:
505:
301:
35:
604:
48:
486:
269:
93:
58:
369:
356:
249:
236:
210:
197:
528:
449:
176:
98:
42:
521:
498:
316:
166:
88:
83:
68:
63:
53:
545:
494:
490:
297:
287:
103:
78:
448:
520:
The
Buildwas Formation comprises olive-green and grey calcareous
627:
and of other Pitted
Brachiopods. Palaeontology 24(3):443-481
586:
Buildwas
Formation - BGS Lexicon of Named Rock Units
565:
List of fossiliferous stratigraphic units in
England
524:and nodular to lenticular calcareous mudstones and
346:
338:
330:
322:
312:
307:
293:
275:
265:
226:
187:
182:
172:
162:
157:
149:
139:
129:
119:
20:
504:. The formation is the defining formation of the
581:
579:
8:
623:A. D. Wright. 1981. The External Surface of
453:Paleogeography of the Early Silurian, 430 Ma
650:Fossiliferous stratigraphic units in Wales
427:
399:
17:
690:Silurian southern paleotropical deposits
575:
7:
153:22 to 40 m (72 to 131 ft)
14:
426:
419:
398:
391:
280:
435:Buildwas Formation (Shropshire)
655:Geologic formations of England
1:
407:Buildwas Formation (England)
228:Approximate paleocoordinates
716:
334:Left bank of Hughley Brook
660:Silurian System of Europe
590:British Geological Survey
385:
30:
552:Eodictyonella capewellii
539:Barr Limestone Formation
134:Barr Limestone Formation
695:Paleontology in England
512:, the Middle Silurian.
454:
438:Show map of Shropshire
452:
685:Deep marine deposits
680:Limestone formations
370:52.64222°N 2.53472°W
675:Mudstone formations
497:dating back to the
473:), formerly called
410:Show map of England
366: /
246: /
207: /
32:Stratigraphic range
483:geologic formation
459:Buildwas Formation
455:
375:52.64222; -2.53472
21:Buildwas Formation
447:
446:
41:433.4–430.5
707:
665:Silurian England
608:
598:
592:
583:
534:Rubery Formation
439:
430:
429:
423:
411:
402:
401:
395:
381:
380:
378:
377:
376:
371:
367:
364:
363:
362:
359:
286:
284:
283:
261:
260:
258:
257:
256:
251:
247:
244:
243:
242:
239:
222:
221:
219:
218:
217:
212:
208:
205:
204:
203:
200:
144:Rubery Formation
115:
45:
18:
715:
714:
710:
709:
708:
706:
705:
704:
640:
639:
616:
614:Further reading
611:
599:
595:
584:
577:
573:
561:
518:
493:. It preserves
443:
442:
441:
440:
437:
436:
433:
432:
431:
414:
413:
412:
409:
408:
405:
404:
403:
374:
372:
368:
365:
360:
357:
355:
353:
352:
281:
279:
254:
252:
248:
245:
240:
237:
235:
233:
232:
215:
213:
209:
206:
201:
198:
196:
194:
193:
114:
113:
112:
111:
106:
101:
96:
91:
86:
81:
76:
71:
66:
61:
56:
51:
40:
39:
38:
22:
12:
11:
5:
713:
711:
703:
702:
697:
692:
687:
682:
677:
672:
667:
662:
657:
652:
642:
641:
638:
637:
634:
631:
628:
621:
615:
612:
610:
609:
593:
574:
572:
569:
568:
567:
560:
557:
517:
514:
445:
444:
434:
425:
424:
418:
417:
416:
415:
406:
397:
396:
390:
389:
388:
387:
386:
383:
382:
350:
344:
343:
340:
336:
335:
332:
328:
327:
324:
320:
319:
314:
310:
309:
305:
304:
295:
291:
290:
277:
273:
272:
267:
263:
262:
230:
224:
223:
191:
185:
184:
180:
179:
174:
170:
169:
164:
160:
159:
155:
154:
151:
147:
146:
141:
137:
136:
131:
127:
126:
121:
117:
116:
109:
108:
107:
102:
97:
92:
87:
82:
77:
72:
67:
62:
57:
52:
47:
46:
28:
27:
13:
10:
9:
6:
4:
3:
2:
712:
701:
698:
696:
693:
691:
688:
686:
683:
681:
678:
676:
673:
671:
668:
666:
663:
661:
658:
656:
653:
651:
648:
647:
645:
635:
632:
629:
626:
622:
618:
617:
613:
606:
602:
597:
594:
591:
587:
582:
580:
576:
570:
566:
563:
562:
558:
556:
554:
553:
547:
542:
540:
535:
530:
527:
523:
515:
513:
511:
510:Wenlock epoch
507:
503:
500:
496:
492:
488:
484:
480:
479:Buildwas Beds
476:
475:Wenlock Shale
472:
471:
466:
465:
460:
451:
422:
394:
384:
379:
351:
349:
345:
341:
337:
333:
329:
325:
321:
318:
315:
311:
306:
303:
299:
296:
292:
289:
278:
274:
271:
268:
264:
259:
250:27.8°S 13.0°W
231:
229:
225:
220:
192:
190:
186:
181:
178:
175:
171:
168:
165:
161:
156:
152:
148:
145:
142:
138:
135:
132:
128:
125:
122:
118:
105:
100:
95:
90:
85:
80:
75:
70:
65:
60:
55:
50:
44:
37:
33:
29:
26:Wenlock Shale
25:
19:
16:
700:Much Wenlock
670:Sheinwoodian
624:
596:
550:
543:
526:argillaceous
519:
506:Sheinwoodian
478:
474:
469:
468:
463:
462:
458:
456:
339:Year defined
308:Type section
302:Wenlock Edge
255:-27.8; -13.0
211:52.6°N 2.5°W
36:Sheinwoodian
23:
15:
625:Dictyonella
605:Fossilworks
516:Description
508:age of the
373: /
361:002°32′05″W
348:Coordinates
253: /
214: /
189:Coordinates
644:Categories
571:References
529:limestones
487:Shropshire
358:52°38′32″N
270:Shropshire
216:52.6; -2.5
522:mudstones
313:Named for
177:Limestone
158:Lithology
150:Thickness
130:Underlies
124:Formation
620:Cardiff.
601:Buildwas
559:See also
499:Silurian
331:Location
323:Named by
317:Buildwas
183:Location
167:Mudstone
140:Overlies
24:formerly
546:Walsall
495:fossils
491:England
481:, is a
298:Walsall
288:England
276:Country
241:13°00′W
238:27°48′S
199:52°36′N
163:Primary
110:↓
502:period
326:Butler
294:Extent
285:
266:Region
202:2°30′W
173:Other
607:.org
477:and
457:The
342:1937
120:Type
49:PreꞒ
603:at
485:in
470:BUI
300:to
646::
588:-
578:^
555:.
541:.
489:,
467:,
464:Bw
99:Pg
43:Ma
34::
461:(
104:N
94:K
89:J
84:T
79:P
74:C
69:D
64:S
59:O
54:Ꞓ
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.