ISSN:0072-1050    

DOI:10.1002/gj.3350010402

出版商:John Wiley&Sons Ltd    

年代:1954

数据来源: WILEY

摘要:

AbstractThe main elements of the non‐marine fauna are reviewed in stratigraphical order in the light of recent revisional work on the Anthracosiidae. Attention is directed towards non‐marine facies and to the lesser known faunas from the upper half of the Lower Coal Measures, from whichCarbonicola extenuataandC. proximaspp. nov. are described. Evidence is adduced to suggest that the boundary between thelenisulcataandcommunisZones, defined by Wray and Trueman (1934) at the top of the Elland Flags in Yorkshire, should be lowered to the horizon of the Upper Band Coal—Pasture Mine.Detailed work on the Bassy Mine succession (Eagar 1952a) has been extended southward to Huyton, near St. Helens, Pott Shrigley in Cheshire, and to Goyt's Moss in Derbyshire. A summary of results of a special study of shells from about the horizon of the Lower Foot Mine at Goyt's Moss reveals evidence bearing on shell shape and ecological station which is generally in conformity with results from other horizons elsewhere (Eagar 1953b).One new marine or estuarine phase (15 feet above the Six Inch Mine near Bacup) and 11 non‐marine horizons, or records of them, have been found or re‐discovered in Lancashire. New localities and two new non‐marine horizons have been found in Yorkshire. Descriptions of faunas include those ofCarbonicolasp. nov. cf.bipennis(Brown), from the horizon of the Lower Foot Mine, assemblages ofC. artifexEagar and variants, andCarbonicola torusEagar. The speciesAnthraconaia(?)prisca(Trueman) is now referred to the genusCarbonicola. Anthraconaiasp. nov. has been discovered on a horizon probably below the Upper Band Coal in a boring at Laisterdyke near Bradford. Another newAnthraconaiahas been found withCarbonicola torus, C.aff.bipennisand shells resemblingAnthracosiafrom the Modiolaris Zone, near the top of the Elland Flags at Kirkheaton, Huddersfield.Anthraconaiacf.modiolaris(J. de C. Sowerby) has been found in a similar fauna in the basalcommunisZone, 60 feet below the Arley Mine at Bolton,

ISSN:0072-1050    

DOI:10.1002/gj.3350010403

出版商:John Wiley&Sons Ltd    

年代:1954

数据来源: WILEY

摘要:

AbstractThe Manx breccias, previously described as crush‐conglomerates of tectonic origin, are ascribed to sub‐aqueous sliding. The stratigraphical succession in the Manx Slates of the northern part of the Isle of Man is deduced, with the aid of the way‐up evidence provided by graded bedding and current bedding. The significance and position of fossils which Bolton claimed he found in the Manx Slates are reviewed and it is concluded that the specimens ofDictyonemaprobably came from the Isle of Man. The way‐up evidence indicates that the slate at the alleged fossil locality (Cronk Sumark) belongs to the youngest exposed division of the Manx Slates, so that other divisions are probably older then T

ISSN:0072-1050    

DOI:10.1002/gj.3350010404

出版商:John Wiley&Sons Ltd    

年代:1954

数据来源: WILEY

ISSN:0072-1050    

DOI:10.1002/gj.3350010405

出版商:John Wiley&Sons Ltd    

年代:1954

数据来源: WILEY

摘要:

AbstractA section in the River Dwyfach shows the main Snowdon Lavas and Tuffs to be overlain by a series of sediments and tuffs with a Longvillian fauna near the base. These sediments are followed by black graptolitic shales belonging to theDicranograptus clinganiandPleurograptus lineariszones overlain by Ashgill mudstones withPhillipsinella parabola.

ISSN:0072-1050    

DOI:10.1002/gj.3350010406

出版商:John Wiley&Sons Ltd    

年代:1954

数据来源: WILEY

摘要:

AbstractCertain abnormalities of growth have recently been seen in specimens of the genusGastrioceras. These take the form of a distinct groove occurring on the venter, and photographs of three specimens showing the salient features of these grooves are reproduced. Details of the abnormalities are given and their significance discussed.

ISSN:0072-1050    

DOI:10.1002/gj.3350010407

出版商:John Wiley&Sons Ltd    

年代:1954

数据来源: WILEY

摘要:

AbstractThe oldest visible Pre‐Cambrian rocks in Lleyn are pillow lavas and sediments of the Gwna Group. They are succeeded by rhyolitic tuffs (Gwyddel Beds). Schists and gneisses have been formed from these rocks. The Sarn adamellite intrusion is related to the gneisses. The Pre‐Cambrian rocks are unconformably overlain by Ordovic

ISSN:0072-1050    

DOI:10.1002/gj.3350010408

出版商:John Wiley&Sons Ltd    

年代:1954

数据来源: WILEY

ISSN:0072-1050    

DOI:10.1002/gj.3350010409

出版商:John Wiley&Sons Ltd    

年代:1954

数据来源: WILEY

ISSN:0072-1050    

DOI:10.1002/gj.3350010416

出版商:John Wiley&Sons Ltd    

年代:1954

数据来源: WILEY