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Birkhill Shale

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( a ) SHRIMP zircon ages for two analytical sessions of <b>Birkhill</b> <b>Shale</b>, mou...
Published: 01 December 2000
F ig . 2. ( a ) SHRIMP zircon ages for two analytical sessions of Birkhill Shale, mount Z16. ( b ) Age vs. grain for between-session duplicates, Birkhill Shale.
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Kerned probability-density plot for all SHRIMP ages from the <b>Birkhill</b> <b>Shale</b>...
Published: 01 December 2000
F ig . 4. Kerned probability-density plot for all SHRIMP ages from the Birkhill Shale.
Journal Article
Published: 01 June 2003
Scottish Journal of Geology (2003) 39 (1): 17–28.
... in the Moffat Shale Group (Birkhill Shale Formation) at the western end of the Ettrick Valley and at Dob’s Linn, and is also known from a mudstone interbed in turbidite sandstones to the north of the Megget Dam. Its associates include Torquigraptus magnificus (Přibyl & Münch), recorded for the first time...
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Journal Article
Published: 01 June 2003
Scottish Journal of Geology (2003) 39 (1): 71–85.
...Anna Chopey-Jones; Mark Williams; Jan Zalasiewicz Synopsis The surviving type material of Campograptus lobiferus ( M’Coy, 1850 ) from the convolutus Biozone (mid-Llandovery) of the Birkhill Shales Formation is redescribed. The material is from the Moffat and Beattock Bridge district of the Southern...
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Journal Article
Published: 01 September 1952
Geological Magazine (1952) 89 (5): 365–368.
...Isles Strachan Abstract Re-examination of specimens labeled Monograptus runcinatus from the Upper Birkhill shales, Glenkiln Burn, Dumfriesshire, Scotland, now in the collections of the Birmingham University, shows them to belong to Diversograptus, not previously recorded in Great Britain. Study...
Journal Article
Published: 01 December 2000
Mineralogical Magazine (2000) 64 (6): 1127–1146.
...F ig . 2. ( a ) SHRIMP zircon ages for two analytical sessions of Birkhill Shale, mount Z16. ( b ) Age vs. grain for between-session duplicates, Birkhill Shale. ...
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Typical graptolites at the Ordovician-Silurian boundary of northwestern Eur...
Published: 01 July 2009
, Eisteddfa, Wales - Gurig; 2: Specimen GB 48bis a 1 , Birkhill Shales, Dob’s Linn; 3: Specimen TCH 102 a 6 , Želkovice Formation, Belec; 4: Specimen SAR 2 e 26 , Genna Muxerru Formation, Monte Cortghiana Becciu; 5: Specimen GB 51 f 1 , Birkhill Shales, Dob’s Linn; 6: Specimen GB 51 h 2 , Birkhill Shales
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( a ) Mixture-modelling main age  vs.  discrimination slope, for two new se...
Published: 01 December 2000
F ig . 3. ( a ) Mixture-modelling main age vs. discrimination slope, for two new sessions on Birkhill Shale zircons, mount Z1230. Agreement requires a low value for the slope. ( b ) Individual SHRIMP ages for the two Z1230 sessions.
Journal Article
Published: 01 June 2012
Geological Magazine (2012) 149 (6): 1089–1106.
... was originally identified by Lapworth ( 1878 ) from the upper Birkhill Shale Formation of Dob's Linn, Scotland, and named after a junior synonym of St. sedgwickii (Portlock, 1843 ): Monograptus spinigerus (Nicholson, 1868 ). In the Barrandian area, a corresponding assemblage...
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Camera lucida  drawings. ( A )  Metabolograptus sibericus  ( Obut 1955 ), h...
Published: 01 November 2011
) Avitograptus avitus ( Davies 1929 ), topotype, Dob's Linn, 1.6–1.65 m above base of Birkhill Shale, ascensus Biozone, GLAHM 131711; ( C ) Avitograptus aff. avitus ( Davies 1929 ), Dob’s Linn, Scotland, 1.3–1.37 m above base of Birkhill Shale, persculptus Biozone, GLAHM 131712; ( D–F, K
Journal Article
Published: 01 December 1979
Journal of the Geological Society (1979) 136 (6): 755–770.
.... A. Drake C. L. Trench Slope Model The Geology of Continental Margins 1974 New York Springer-Verlag 249 60 Toghill P. The graptolite assemblages and zones of the Birkhill Shales (Lower Silurian) at Dobb's Linn Palaeontology 1968 11 654 68 Toghill P. Highest Ordovician...
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( A )-( H )  Coronograptus cyphus  (Lapworth), in the sense of his figured ...
Published: 01 June 2003
1433, long distal fragment, with proximal-most thecae apparently bearing hooked metathecae: this specimen is that figured by Elles & Wood (1911 , plate 36, fig. le) as C cyphus. ( H ) BU 1431, a specimen with traces of hooked theca proximally. Localities: all specimens are from the Birkhill
Journal Article
Published: 01 September 1991
Journal of the Geological Society (1991) 148 (5): 861–868.
... of Structural Geology 1980 2 317 331 Toghill P. The graptolite assemblages and zones of the Birkhill Shales (Lower Silurian) at Dobb's Linn Palaeontology 1968 11 654 668 Veblen D. R. Guthrie G. D. Livi K. J. T. Reynolds R. C. High-resolution transmission electron...
Journal Article
Published: 01 September 1988
Journal of the Geological Society (1988) 145 (5): 749–757.
... of the Birkhill Shales, which may be similar though seemingly with robust proximal spines. Talacastograptus has some resemblance to Pseudoclirnacograptus (Clinocli- macograptus) Bulman & Rickards, 1968, but it differs in having strongly introverted thecae, as opposed to thecae with pronounced apertural evertion...
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(A)-(E)  Coronograptus cyphus  (Lapworth) sensu ( Elles &amp; Wood 1911 ). ...
Published: 01 June 2003
GSM 95280, figured Elles & Wood (1911 , fig. 236a). Localities: (A)-(C) from the Birkhill Shale Formation, Moffat Shale Group, cyphus graptolite Biozone, Dob's Linn, near Moffat, southern Scotland; (D) and (E) Rheidol Gorge, Wales (see Jones 1909 ). Magnifications: (A)-(C) ×5; (D
Journal Article
Journal: GSA Bulletin
Published: 01 November 2013
GSA Bulletin (2013) 125 (11-12): 1635–1670.
... isotope values also suggests less intense water-column denitrification. In the overlying late Hirnantian and early Rhuddanian, the distribution of black shales reaches its greatest extent in the studied interval. Localities showing evidence of anoxia are globally spread over all paleolatitudes and water...
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( A )-( J )  Huttagraptusl praematurus  (Toghill 19686). ( A ) topotype, pr...
Published: 01 June 2003
the type horizon and locality of Huttagraptusl praematurus; ( H ) and ( I ) from the Slate Quarry Beds, Little River Group, Pomeroy, Northern Ireland; ( J ) from the Birkhill Shale Formation, Dumfriesshire, NGR [NY 0626 9496]; ( K ) and ( L ) from the type horizon and locality of Huttagraptus
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Comparative material of  Campograptus lobiferus  (M'Coy)  (D)-(L)  and  Sti...
Published: 01 June 2003
, NGR [NT 1188 0165], horizon 1, sedgwickii Biozone, of Williams et al. (2003 ); (C) Pot Burn, Ettrick Valley, NGR [NT 1188 0165], horizon 3, sedgwickii Biozone, of Williams et al. (2003 ); (D) Washy Burn, NGR [NT 1188 0165], convolutus Biozone; (E) Birkhill Shales Formation, old
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Torquigraptus  from upper Aeronian strata of Scotland.  (A)–(F)  and  (K)–(...
Published: 01 June 2003
) and (D) Pot Burn, horizon 1 (Fig. la, locality 2), sedgwickii Biozone; (L) and (M) Little Smid Hope (Fig. 1a, locality 1), halli Biozone; (G) Duftkinnel, north of Glenhall, 7.5 miles (12 km) NNW of Lochmaben (c. NGR [NY 060 957]), convolutus or sedgwickii Biozone; (H)–(J) Birkhill
Series: Geological Society, London, Special Reports
Published: 01 January 2000
DOI: 10.1144/SR24.9
EISBN: 9781862396920
... . Correlation chart of the Ordovician rocks in the Southern Uplands Terrane, Columns, 60-72. Location of fault tracts is shown on Fig. 21 , and location of Moffat and Ettrickbridge are shown on Fig. 3. See Table 1 for stratigraphical groups. The Birkhill Shale Formation is shown in black. and Kirkton...
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