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Hartfell Shale

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Journal Article
Journal: AAPG Bulletin
Published: 01 January 1952
AAPG Bulletin (1952) 36 (1): 1–72.
...Charles E. Decker ABSTRACT In this article the evidence is presented from the study of many hundreds of graptolites collected by zones from practically every fossiliferous outcrop of the Athens shale in about 600 miles of its extent from central Alabama across northwestern Georgia and eastern...
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Journal Article
Published: 01 April 1980
Journal of the Geological Society (1980) 137 (2): 139–156.
...J. K. Leggett Abstract A review of Lower Palaeozoic black shale occurrences in the British Isles shows that carbon preservation in sediments, both in deep marine and shelf environments, occurs preferentially during phases of eustatic transgression (Caradoc and Lower Llandovery). Depletion of O 2...
Journal Article
Published: 01 June 2003
Scottish Journal of Geology (2003) 39 (1): 17–28.
..., the Moffat Shale Group, typically crops out in small 'inliers' within the sandstone and, in its fullest development, comprises three lithologically distinct units, the Glenkiln, Hartfell and Birkhill Shale formations (see Webb et al. 1993). Graptolite faunas are abundant in the Moffat Shale Group and more...
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Journal Article
Published: 01 December 1979
Journal of the Geological Society (1979) 136 (6): 755–770.
... (Hartfell Shales) graptolite faunas from the Moffat area, south Scotland Bull. Br. Mus. naf. Hist., Geol 1970a 19 1 26 Toghill P. The south-east limit of the Moffat Shales in the upper Ettrick valley region, Selkirkshire Scott. J. Geol 1970b 6 233 42 Toghill P. Strachan I...
Journal Article
Published: 01 May 2002
Proceedings of the Yorkshire Geological Society (2002) 54 (1): 1–16.
... forms. The types of C. miserabilis (see synonomy) come from the late Ordovician Upper Hartfell Shale. I do not agree with Williams (1987 , p. 80) that the Silurian forms have more glyptograptid thecae; when well preserved in three dimensions, they are clearly climacograptid. Nevertheless...
Journal Article
Journal: AAPG Bulletin
Published: 01 December 1933
AAPG Bulletin (1933) 17 (12): 1405–1435.
.... Two sponges, Ischadites cf. iowensis and Receptaculites cf. oweni , occur in the Trenton and Galena. Of the 30 different graptolites in the Viola, 5 occur in the Normanskill, 7 in the Trenton, 9 in the Utica, 4 in the Lorraine, 2 in the Richmond, and 7 in the Hartfell shales of Scotland...
FIGURES
Journal Article
Published: 01 September 1988
Journal of the Geological Society (1988) 145 (5): 749–757.
... Parakidograptus acuminatus and possible Atavograptus. &dcl001; The Talacasto section thus allows the closest definition of the Ordovician–Silurian boundary in South America. The shales of the La Chilca Formation are 3.65 m thick, rich in graptolites, and have allowed us to recognize for the first time...
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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Specimens of the three climacograptid species represented among the type ma...
Published: 01 November 2011
Fig. 2 Specimens of the three climacograptid species represented among the type material of Climacograptus miserabilis Elles & Wood (1906) to emphasize some details of rhabdosome internal structure; upper Hartfell Shale, Dob's Linn (Scotland). ( A–D, G, H, I ) Climacograptus miserabilis
Journal Article
Journal: AAPG Bulletin
Published: 01 February 1953
AAPG Bulletin (1953) 37 (2): 451–452.
... it in the upper Hartfell shales, Upper Ordovician, and in a table they show this species as the type form for Upper Ordovician. These references show clearly that Dicellograptus complanatus occurs in the Upper Ordovician, and they emphasize the importance of finding this type species in the Sylvan shale...
FIGURES
Series: Geological Society, London, Special Reports
Published: 01 January 2000
DOI: 10.1144/SR24.9
EISBN: 9781862396920
.... Williams (1994) defined the base of the Lower Hartfell Shale Formation at Hartfell Score. Zalasiewicz et al . (1995) subsequently presented a range chart for the graptolites there and subdivided the clingani Biozone into the caudatus and morrisi subzones. The Lower Hartfell Shale Formation...
FIGURES
Journal Article
Journal: Geology
Published: 18 May 2020
Geology (2020) 48 (8): 777–781.
... Hartfell Shale and the Birkhill Shale. We collected 10 further samples at the stratotype itself (55°25′46.799″N, 3°16′16.977″W) to fill a 2 m gap at the top of the Upper Hartfell Shale (poorly exposed in our main section). In the laboratory, fresh samples were powdered by agate mortar and pestle. We...
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MAGNIFICATION ×2.  Figs. 1, 1a.— Dicellograptus complanatus  var.  tenuis  ...
Published: 01 January 1952
shale in Heath Valley region of southwestern Arkansas. Figs. 2, 2a, 2b. Dicellograptus complanatus Lapworth. In shaly films in fragments of colony in limestones 500 yards east of highway at Lacey Spring, Virginia; Sylvan-Polk Creek of Oklahoma and Arkansas; upper Hartfell of Great Britain. Figs. 3
Journal Article
Published: 01 August 1997
Journal of the Geological Society (1997) 154 (4): 709–718.
...: geochemical, sedimento logical and paleonto logical evidence Canadian Journal of Earth Sciences 1993b 30 1870 1880 Williams S.H. Upper Ordovician graptolites from the top Lower Hartfell Shale Formation (D. clingani and P. linearis zones) near Moffat, southern Scotland Transactions...
Journal Article
Published: 01 December 1997
Journal of the Geological Society (1997) 154 (6): 929–934.
... carbon isotope excursion starts within the complexus Biozone with values declining gradually to a maximum of "29 in the mid-extraordinarius Biozone. Sedimentary facies of the Upper Hartfell and lowermost Birkhill Shale Formations The Dob s Linn succession formed as part of a deep-water, tropical...
Journal Article
Journal: AAPG Bulletin
Published: 01 September 1936
AAPG Bulletin (1936) 20 (9): 1252–1257.
... Hartfell shale near the top of the Ordovician in Great Britain, where the Ordovician and Silurian were named and differentiated. This places the Sylvan and Polk Creek definitely in the uppermost Ordovician, where Taff 8 failed to place it, though he said that the fauna was typically Ordovician...
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—(LOWER PART) WITH SPECIES IN TOP ZONE AT OVERALL, VIRGINIA. MAGNIFICATION ...
Published: 01 January 1952
brevis Elles & Wood. In Glenkiln and lower Hartfell of England, Scotland, Wales; short, small; and in Athens of Virginia, Tennessee, Bornholm Island, and Belgium. Fig. 4.— Climacograptus caudatus Lapworth. Characteristically large stipe with proximal extension which at times occurs as long curved
Journal Article
Published: 01 November 2004
Geological Magazine (2004) 141 (6): 735–738.
..., Canada . Canadian Journal of Earth Sciences 14 , 932 – 52 . Williams , S. H. 1982 . Upper Ordovician graptolites from the top Lower Hartfell Shale Formation ( D. clingani and P. linearis zones) near Moffat, southern Scotland . Transactions of the Royal Society of Edinburgh; Earth...
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Journal Article
Journal: AAPG Bulletin
Published: 01 March 1936
AAPG Bulletin (1936) 20 (3): 301–311.
... erratic masses. The Sylvan and Polk Creek are linked also with the Maquoketa by means of the two graptolites. But still more significant is the fact the chief zone fossil of the upper Hartfell shale of Great Britain, Dicellograptus complanatus , occurs commonly in both the Polk Creek and Sylvan, thus...
Journal Article
Published: 01 August 1990
Journal of the Geological Society (1990) 147 (4): 611–614.
... Hartfell Shale formation ( D . clingani and P. linearis zones) near Moffat, southern Scotland. Transactions of the Royal Sociery of Edinburgh: Earth Sciences, 72, 229-255. - 19826. The late Ordovician graptolite fauna of the Anceps Bands at Dob s Linn, southern Scotland. Geologica et Palaeontologica, 16...