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lower Bajocian

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Journal Article
Published: 01 September 2011
Bulletin de la Société Géologique de France (2011) 182 (5): 405-415.
...Sixto Rafael Fernández-López Abstract Several ammonite fossil assemblages from Sierra de Albarracín (Teruel, Castilian Branch) contain abundant specimens of the Ovale and Laeviuscula zones (lower Bajocian, Middle Jurassic), including microconchs and macroconchs of the characteristic genus...
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Journal Article
Published: 01 May 2011
Bulletin de la Société Géologique de France (2011) 182 (3): 241-254.
... Toarcian-lowermost Bajocian interval. The best fossiliferous sections containing hammatoceratoids are located in the central and eastern sector of the Median Subbetic. In these areas grey marls and marly-limestone rhythmites are the predominant lithofacies from the Upper Toarcian to Lower Bajocian interval...
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Journal Article
Published: 03 April 2000
Canadian Journal of Earth Sciences (2000) 37 (4): 549-567.
... to Planulata zones (lower to middle Toarcian), 179.8 ± 6.3 Ma from the Yakounensis Zone (upper Toarcian) to the lower Bajocian, Ma from the Rotundum Zone (upper Bajocian), Ma from the upper Bathonian, and from the upper Bathonian to lower Callovian. Five other dates are inferior in precision, but still provide...
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Image
Stratigraphic log of the upper Toarcian – <b>lower</b> <b>Bajocian</b> transition in the ...
Published: 01 September 2011
F ig . 3. – Stratigraphic log of the upper Toarcian – lower Bajocian transition in the section of Masada Toyuela, with the position of the Albarracinites beds. F ig . 3. – Colonne stratigraphique du passage Toarcien supérieur – Bajocien inférieur de la coupe de Masada Toyuela, avec la
Image
Witchellia  sp., macroconch. Laeviuscula Zone, <b>lower</b> <b>Bajocian</b>. Masada Toyue...
Published: 01 September 2011
F ig . 6. – Witchellia sp., macroconch. Laeviuscula Zone, lower Bajocian. Masada Toyuela (Albarracín, Teruel). Coll. SRFL, specimen MT2/1089. Reelaborated internal mould (i. e., mould exhumed and moved before the final burial) of an incomplete phragmocone showing: (SI1, SI2) several phases
Image
“ Fontannesia ” sp., microconch. Laeviuscula Zone, <b>lower</b> <b>Bajocian</b>, Masada T...
Published: 01 September 2011
F ig . 7. – “ Fontannesia ” sp., microconch. Laeviuscula Zone, lower Bajocian, Masada Toyuela (Albarracín, Teruel). Coll. SRFL, specimen MT2/700. The asterisk indicates the beginning of the body chamber. Reelaborated, concretionary internal mould of an isolated body chamber showing: (PD
Journal Article
Journal: Paleobiology
Published: 24 April 2015
Paleobiology (2015) 41 (3): 415-435.
... of the lower Bajocian, coeval with an increase in absolute and relative abundances of Watznaueria spp., followed by a plateau in the middle and upper part of the lower Bajocian. The increase of Watznaueria spp. is synchronous with a decrease in relative abundance of other major coccolith taxa, whereas...
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Journal Article
Published: 01 December 2012
Journal of Sedimentary Research (2012) 82 (12): 953-968.
...Alejandra García-Frank; Soledad Ureta; Ramón Mas Abstract: Condensed intervals provide a framework to study evolution of iron-coated particles. This study examines the iron-rich particles contained in the condensed carbonate deposits spanning from uppermost Toarcian to lower Bajocian...
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Journal Article
Published: 01 December 1986
Canadian Journal of Earth Sciences (1986) 23 (12): 1963-1973.
...Robert C. Thomson; Paul L. Smith; Howard W. Tipper Abstract The Lower to Middle Jurassic (Pliensbachian to lower Bajocian) Spatsizi Group in the northern Spatsizi area of north-central British Columbia is formally defined and subdivided into the Joan, Wolf Den, Melisson, Abou, and Quock formations...
Journal Article
Published: 01 September 2009
Bulletin de la Société Géologique de France (2009) 180 (5): 411-430.
.... It is divided into two members. The lower member (Aalenian to lower Bajocian) consists of siliceous limestone and rare chert, whereas the upper member (upper Bajocian to lower Tithonian) is composed of radiolarian chert that locally in the upper part contains abundant marl intercalations. In the southern part...
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Journal Article
Published: 01 January 2017
Bulletin de la Société Géologique de France (2017) 188 (1-2): 1-9.
... units are introduced: the Paramegateuthis subishmensis Zone (upper part of the Lower Bajocian) and the Paramegateuthis ishmensis Zone (Lower-Middle Bathonian boundary interval). Paramegateuthis subishmensis Stoyanova-Vergilova, recorded for the first time in Siberia and previously only known from...
Journal Article
Published: 01 April 2013
Journal of Foraminiferal Research (2013) 43 (2): 182-206.
... impoverishment at the Aalenian–Bajocian transition, an important foraminiferal turnover takes place in the early Bajocian, where some Lower Jurassic and Aalenian forms are replaced by typical Middle Jurassic taxa. 3 Correspondence author. E-mail: mcanales@geo.ucm.es 01 08 2012 09 01 2013...
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Journal Article
Published: 01 October 1979
Canadian Journal of Earth Sciences (1979) 16 (10): 2060-2062.
... of the Aalenian stage = Lower Bajocian s . l .; (3) following the resolution of the 1st Luxembourg Colloquium it is placed at the Aalenian/Bajocian s . str . boundary. Subsequent resolutions of the Cassis Meeting and, equivocally, of the 2nd Luxembourg Colloquium, however, rescinded the third usage because...
Series: Geological Society, London, Special Publications
Published: 01 January 2009
DOI: 10.1144/SP312.15
EISBN: 9781862395602
... Formation indicate widespread transgression, followed by rapid lateral facies and thickness variations in the succeeding Lower Bajocian Hojedk Formation. This tectonic instability culminated in the middle Bajocian compressional–extensional Mid-Cimmerian event. The resulting Mid-Cimmerian unconformity...
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Journal Article
Published: 01 January 1951
Bulletin de la Société Géologique de France (1951) S6-I (4-6): 221-232.
...Marcel Pelletier Abstract A study of the coral faunas of two limestone zones intercalated in the Bajocian (Jurassic) of the southern Jura region, France, one in the Sonninia sowerbyi zone (lower Bajocian) and the other at the top of the Otoites sauzei and in the Witchellia romani zones (middle...
Journal Article
Journal: GeoArabia
Publisher: Gulf Petrolink
Published: 01 October 2015
GeoArabia (2015) 20 (4): 125-180.
... Sinemurian–Early Aalenian and contains Middle Toarcian MFS J10. The overlying Dhruma Formation is Middle or Late Aalenian (Zone NJT 8c) or older, to Late Bajocian (Subzone NJT 10a), and contains Lower Bajocian MFS J20. The overlying Sargelu Formation consists of the Late Bajocian (Subzone NJT 10b) Sargelu...
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Series: AAPG Memoir
Published: 01 January 1993
DOI: 10.1306/M57579C3
EISBN: 9781629810980
... Pliensbachian deposition and tectonism; (2) a transgressive systems tract and high-stand systems tract (Toarcian); (3) a small-scale type 1 sequence boundary (late Toarcian-Lower Bajocian?); (4) a drowning sequence (Aalenian-Upper Bajocian); and (5) a composite condensed section (Upper Bajocian-Tithonian...
Series: AAPG Special Publication
Published: 01 January 1958
DOI: 10.1306/SV17349C3
EISBN: 9781629812441
... formation possibly represent the lower Bajocian or earlier Jurassic stages. A minor unconformity of Middle Jurassic age is indicated by the occurrence of chert on top of the marine carbonates of the Gravelbourg. The evidence for this unconformity is strongest in central and southeast Saskatchewan...
Journal Article
Published: 01 July 1973
Canadian Journal of Earth Sciences (1973) 10 (7): 1109-1131.
...Hans Frebold; H. W. Tipper Abstract In the Smithers area of British Columbia, faunas are recognized below the beds with Lilloettia , Kepplerites , and other characteristic Lower Callovian ammonites. The upper one includes Arctocephalites ( Cranocephalites ) costidensus Imlay, Parareineckia cf. P...
Journal Article
Published: 01 November 2001
Bulletin de la Société Géologique de France (2001) 172 (6): 723-736.
... Middle Atlas trough during the Toarcian and the lower Bajocian interval. A lithostratigraphic succession of the "Couches du Selloum" raised in the western part of Bekrit-Timahdite syncline shows the superposition of three units. Unit 1 is made of clay, reddish and gray marl, locally gypseous, assigned...